JPH07109857A - Electronic time lock control mechanism - Google Patents

Abstract

PURPOSE:To prevent unlocking impossibility, by monitoring the central processing unit and the voltage supplied to first and second drive motors and providing a voltage-monitor circuit actuating the unlocking motion when the voltage drops. CONSTITUTION:When a first voltage-monitor circuit 41a detects that the voltage supplied to CPU 34 and the main motor 10 has gotten lower than +4V, it transmits a signal to CPU 34 and CPU 34 outputs an actuation signal to the first and second unlocking circuits 39a, 39b to rotate the main motor 10 and the submotor 11 and unlock by a locking and unlocking mechanism A. When the first and second locking and unlocking sensors 41a, 41b detects the unlocked state, the sensors transmit unlocked signals to the first calender IC38a and CPU 34, and the second calender IC38b and CPU 34. The CPU 34 chances always the data written in IC38a, IC38b to unlocking data and mislocking due to runaway or CPU 34 or the like is prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control mechanism for a time-lock device such as a safe device, and more particularly, to an electronic time-lock for improving the safety against unlocking by duplicating a control system for locking and unlocking. Regarding control mechanism.

[0002]

2. Description of the Related Art Some safes and the like are provided with a so-called time-lock mechanism that prevents unlocking before a predetermined time. This time-lock mechanism is also realized as a mechanical type that mechanically locks the time or an electronic type that electronically locks the time under the control of a central processing unit (hereinafter referred to as CPU).

However, in the electronic time-lock mechanism, if the built-in CPU goes out of control or an abnormality occurs in the memory for storing unlocking data, the device does not operate normally,
The unlocking may not be possible within the set unlocking time. In addition, when a voltage drop occurs due to consumption of the battery in the power supply unit, conventionally, only an alarm such as displaying the voltage drop is issued, and when the unlocking time comes, the device becomes inoperable due to the battery running out. It may become impossible to unlock.
Further, in the conventional electronic time-lock control mechanism, the central processing unit is always in the control operating state, and therefore the battery of the power supply unit is largely consumed. For example, the unlocking time is set for a long period of about one month. That was unreasonable.

[0004]

SUMMARY OF THE INVENTION The present invention was devised to solve the above-mentioned problems, and by duplicating the unlocking control system, it is impossible to unlock due to a runaway CPU or memory abnormality. It is an object of the present invention to provide an electronic time-lock control mechanism capable of preventing the occurrence of the above-mentioned problem and preventing the inability to unlock due to the voltage drop. When the locking / unlocking mechanism does not operate, the power supplied to the CPU is reduced to enter the sleep mode.
By reducing the power consumption by stopping the power supply to the display unit, it is possible to provide an electronic time-lock control mechanism that can downsize the device casing and set the unlocking time over a long period of time. Has an aim.

[0005]

In order to solve the above-mentioned problems, the present invention provides a system memory for storing a device control program, a timer for timekeeping, an input section for inputting data, and an input section from this input section. It has an EEPROM as a data memory for storing input data and a display section for displaying the input data and the like, and performs an unlocking operation at a preset time under the control of the central processing unit and an unlocking operation. An electronic time-lock control mechanism having a dual control system, comprising: a first drive motor and a second drive motor for driving a locking / unlocking mechanism to perform an unlocking operation; A first unlocking circuit for controlling the first drive motor and a second unlocking circuit for receiving and operating an unlocking signal to control the second drive motor and storing unlocking time data; This memory When the unlocking time comes, a signal is sent to the central processing unit, and an operating signal is sent from the central processing unit to the first unlocking circuit and the second unlocking circuit, and at the same time, the first unlocking circuit. A first calendar IC for directly sending an actuation signal to the CPU and data of unlocking time are stored, and when the stored unlocking time is reached, a signal is sent to the central processing unit to send the central processing unit. Second calendar IC for transmitting an unlocking operation signal from the first unlocking circuit to the first unlocking circuit and the second unlocking circuit and directly sending the unlocking operation signal to the second unlocking circuit And a configuration including.

Further, the voltages supplied to the central processing unit, the first drive motor and the second drive motor are monitored, and when these voltages drop below a predetermined value, a signal is sent to the central processing unit. And a voltage monitoring circuit for sending an actuation signal from the central processing unit to the first unlock circuit and directly sending an actuation signal to the second unlock circuit. The electronic time lock control mechanism according to claim 1.

Further, it has a locking / unlocking sensor for detecting unlocking and locking, and when the unlocking or locking state is detected by the locking / unlocking sensor, the unlocking or locking is detected at the time of the timer. The electric power supplied to the central processing unit after a lapse of a predetermined time is reduced from the electric power for control operation until then to the electric power for sleep mode, and for the control operation based on the signal transmission by the arrival of the unlocking time by the calendar IC. The electronic time lock control mechanism according to claim 1 or 2, further comprising a power saving mechanism for supplying electric power.

Further, when the unlocking or locked state is detected by the locking / unlocking sensor, the power supply to the display unit is stopped after a lapse of a predetermined time after the unlocking or locking is detected by the timer. The electronic time-lock control mechanism according to claim 3, further comprising a power-saving mechanism that starts power supply based on a signal transmission when the unlock time is reached by the calendar IC. .

[0009]

[Operation] The first calendar IC that stores the unlocking time
When the unlocking time comes, the signal of the unlocking time comes C
Send to PU. The CPU which receives this signal sends an operation signal to the first and second unlocking circuits. The first calendar IC also sends the unlocking operation signal directly to the first unlocking circuit without passing through the CPU. In the first unlocking circuit which receives these signals, signals are sent to the first drive motor, and the locking / unlocking mechanism is operated by the rotation of the drive motor to unlock.

On the other hand, the second calendar IC which also stores the unlocking time, like the first calendar IC,
When the stored unlocking time arrives, a signal indicating that the unlocking time has arrived is sent to the CPU, and the CPU receiving the signal sends the first unlocking signal.
And sends an actuation signal to the second unlocking circuit. This second
The calendar IC also sends an activation signal directly to the second unlocking circuit. The first and second unlocking circuits receiving these actuation signals respectively send signals to the first and second drive motors, and the rotation of the drive motors actuates the locking / unlocking mechanism to perform unlocking. . As described above, even when the CPU does not operate normally due to runaway or the like, the first and second drive motors reliably rotate to operate the locking / unlocking mechanism, so that unlocking is not possible.

The voltage monitoring circuit monitors the voltage supplied to the CPU and the first drive motor and the second drive motor, and when this voltage value is below a predetermined value, this signal is sent to the CPU. Send to. CPU receiving this signal
In the above, the operating signal is sent to the first and second unlocking circuits, and the signal causes the first and second unlocking circuits to move to the first
And sends a signal to the second drive motor. As a result, the first and second drive motors rotate and the locking / unlocking mechanism operates to unlock. The voltage monitoring circuit also sends an actuation signal directly to the second unlocking circuit, and the actuating signal of the second unlocking circuit causes the locking / unlocking mechanism to be actuated by the rotation of the second drive motor, thereby unlocking. Done.

As described above, when the voltage supplied to the CPU and the first and second drive motors drops below a predetermined value, the unlocking operation immediately starts regardless of whether the unlocking time has come. When the lock time arrives, it is possible to prevent a situation in which the device cannot be unlocked without operating due to a decrease in the power supply voltage. In this case, unlock via the CPU and CP
By providing a path for sending a signal directly to the unlocking circuit without going through U and unlocking, there is no possibility that unlocking will not be possible due to runaway of the CPU, etc. It is similar to the case of the lock.

Further, when the unlocking and locking sensor for detecting unlocking and locking detects the unlocking and locking, the power saving mechanism controls the display of power to the display unit after a predetermined time has elapsed since the unlocking and locking was timed by the timer. The power supply is stopped and the power supplied to the CPU is reduced from the control operation power to the sleep mode power. This can significantly reduce power consumption.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. First, the locking / unlocking mechanism will be described. FIG. 7 is a front external view of an electronic time lock mechanism attached to the safe. The electronic time lock mechanism 1 has a locking / unlocking mechanism A which will be described later, and is attached to the back surface of a safe device door (not shown) with fixing bolts 2a, 2b, 2c and 2d. At the time of locking, by operating a handle (not shown) arranged in front of the closed safe device door as will be described later, the hook 3 is projected rightward in the drawing and fitted into the hook hole (not shown), and this state is set. It is designed to be performed by disabling the retreat of the Kannuki 3.

On the operation panel 4 of the electronic time lock mechanism 1, a numeric keypad 4a for inputting data such as unlocking time.
Further, a liquid crystal display 4b is provided as a display unit for digitally displaying unlocking data and the like input by the ten keys 4a. Also, in the case where a person is trapped inside the safe with the door locked and the time locked, an emergency solution that enables the trapped person to unlock at any time regardless of the set time of the time lock. A lock knob 5 is provided. Details will be described later.

FIG. 8 is a front view of the locking / unlocking mechanism A in a state where the operation panel 4 as the housing of the time lock mechanism 1 shown in FIG. 7 is removed. Reference numerals 2a ', 2b', 2
c ', 2d' are the fixing bolts 2a, 2b, 2c, 2
It is the insertion hole of d. 9 is a sectional view taken along the line AA of FIG. 8, FIG. 10 is a right side view, and FIG. 11 is a sectional view taken along the line BB of FIG. As is clear from FIG. 9 and the like, these locking / unlocking mechanisms A are arranged on the outer surface of the locking / unlocking portion 6 and the cover 6a of the locking / unlocking portion 6, and a driving portion 7 for driving the locking / unlocking portion 6. It is composed of

First, the drive section 7 will be described. In this drive unit 7, a bracket 8 (see FIG. 10) having a U-shaped cross section has a cover 6a of the locking / unlocking unit 6 with its open end facing outward.
The upper bracket 8a and the lower bracket 8b are fixed to each other by bolts. Battery cases 9a and 9b for storing batteries 9a 'and 9b' (see FIG. 8), which are power sources for driving various parts of the apparatus, are placed and fixed on the upper surface of the upper bracket 8a.
Four AA type alkaline batteries of 5V are stored in a and 9b, respectively. 9a "and 9b" shown in FIG.
Is a wiring terminal. Illustration of wiring to each part is omitted.

Further, on the lower surface of the lower bracket 8b, a main geared motor 10 (hereinafter, referred to as a main motor) as the first drive motor, and the second
A sub geared motor 11 (hereinafter, referred to as a sub motor) as a drive motor of is fixed by bolts (see FIGS. 8 and 9). The rotary shafts 10a and 11a of the main and sub motors 10 and 11 penetrate the lower bracket 8b and extend upward, and the first drive eccentric cam 12 and the second drive shaft 12a are driven by the upper surface of the lower bracket 8b. Eccentric cam 13 (see FIGS. 8 and 9) and a first sensor eccentric cam 14 for detecting locking / unlocking,
The second sensor eccentric cam 15 (see FIGS. 8 and 11) is fixedly mounted on the shaft. In the first and second driving eccentric cams 12 and 13, and the first and second sensor eccentric cams 14 and 15, first, the first and second sensor eccentric cams 14 and 15 located above are first located. Is B- in FIG.
As shown in FIG. 11 which is a cross-sectional view taken in the direction of the arrow B, a first locking / unlocking described below for detecting locking / unlocking described below is provided on both sides of each of the first and second sensor eccentric cams 14 and 15. Microswitches 16 and 17 as sensors and microswitch 1 as second locking / unlocking sensor
8 and 19 are fixed to the lower surface of the upper bracket 8a by bolting.

The long diameter portions of the eccentric cams 14 and 15 for the first and second sensors are at positions (hatched portions) shown by solid lines in FIG. 11, that is, when the long diameter portions are on the right side of the drawing, the micro switch 16 is provided. And the contact of 18 is O
N, and the unlocked state is detected by this. Further, when the main and sub motors 10 and 11 make a half rotation from this state, the first and second sensor eccentric cams 14 and 15 also make a half rotation, and the position of the broken line shown in FIG. When it is located at, the long diameter portion turns on the contact points of the microswitches 17 and 19, thereby detecting the locked state. Regarding the first and second drive eccentric cams 12 and 13 (see FIGS. 8 and 9) which are another eccentric cam fixed to the rotary shafts 10a and 11a of the main and sub motors 10 and 11 Will be described later.

As shown in FIGS. 8 to 10, a pair of support bases 20 and 21 having a predetermined height are provided on the outer surface of the cover 6a of the locking / unlocking portion 6, and the support base 20 is provided. ，
The lower ends of the first drive lever 22 and the second drive lever 23 are screwed to the tip of 21 by screws 22a and 23a. Of these, the second drive lever 23 is rotatably screwed to the support base 21 with a screw 23a, while the first drive lever 22 is used for the support base 2.
Screw 2 to the lever shaft 28 (see FIG. 9) that is inserted inside
2a, and the lower part of the lever shaft 28 is fixed to the rotating lever 29 by a screw 28 ', and the rotating lever 29, the lever shaft 28, and the first drive lever 22 rotate together. It is like this.

Further, as shown in FIG. 8 and the like, rectangular drive plates 24 are provided at the tip ends of the first drive lever 22 and the second drive lever 23, respectively.
Of the first drive lever 22 and the second drive lever 23 while connecting the respective tip portions of the first drive lever 22 and the second drive lever 23 so that the first drive lever 22 and the second drive lever 23 are connected to each other. The tip and the drive plate 24 are attached so as to be rotatable. Therefore, the first
The rotation of the drive lever 22 and the second drive lever 23 and the left and right sliding movement of the drive plate 24 are interlocked.

Further, the drive plate 24 has a pair of locking pins, that is, a first locking pin 25 and a second locking pin 2.
6 (see FIG. 9 and the like) is fixed by screws 25 'and 26' with its tip end facing the cover 6a of the locking / unlocking portion 6 so as to be orthogonal to the drive plate 24. The first and second locking pins 25 and 26 are the other eccentric cams which are driven by the main and sub motors 10 and 11 for which the above description is suspended, and the first and second driving eccentric cams 12 and It comes in contact with 13. In this case, as will be described later, the first and second locking pins 25, 26 are located at positions where the long diameter portions of the first and second drive eccentric cams 12, 13 (see FIG. 9) are on the right side in the drawing. Abut
As a result, when the drive plate 24 is pressed to the right in the drawing and slides, it is unlocked. From this position, the first and second drive eccentric cams 12, 13 make a half rotation, and when the long diameter part is located on the left side, the drive plate 24 is driven. The plate can also be locked by sliding it to the left in the drawing. This point will be described later.

Reference numeral 27 shown in FIG. 9 and the like indicates an emergency unlocking unit, which can be unlocked at any time regardless of the set time of the time lock in an emergency such as when a person is trapped inside the safe. It was done. That is, the emergency unlocking section 27 is erected from the bottom surface of the locking / unlocking section 6 so as to pass through the cover 6a, and the emergency unlocking knob 5 located on the operation panel 4 shown in FIG. In order to transmit the rotation of the emergency unlocking knob 5, an emergency unlocking lever shaft 27b rotatably supported by a screw 27a 'on a rotation return plate 27a arranged at the lower end thereof, The emergency unlocking lever shaft 27b includes an eccentric cam-shaped emergency unlocking lever 27c that has a long diameter portion and a short diameter portion that are fixedly installed.

The emergency unlock lever 27c is arranged at a position where it comes into contact with the drive plate 24 (see FIGS. 8 and 9), and the emergency unlock knob 5 is rotated clockwise by about 45 °. Then, as shown in FIG. 8, the long diameter portion of the eccentric cam-shaped emergency unlocking lever 27c also rotates clockwise about 45 ° and abuts against the drive plate 24 to push the drive plate 24 to the right in the drawing. Slide it. The lock is unlocked by sliding the drive plate 24 to the right. This unlocking operation will be described later. Further, the rotation return plate 27a, which pivotally supports the emergency unlock lever shaft 27b at the lower end portion, is urged by the return spring 27d (see FIG. 12) unless a rotational force is applied as described later. By Figure 8
Alternatively, it returns to the original position shown in FIG. 9, that is, the position where the drive plate 24 is not pressed.

Next, the structure of the locking / unlocking unit 6 will be described.
FIG. 12 is a rear view in which FIG. 7 or FIG. 8 is a front view, and the left and right sides of FIG. 7 and FIG. 8 are displayed in opposite positions. In FIG. 12, the rotating lever 29 is rotatably connected to one end of a connecting lever 31, and the other end of the connecting lever 31 has a support shaft 32 of a lock 32.
It is rotatably connected to the peripheral portion of a. That is, the lock 32 is rotatably supported by the support shaft 32a,
The front end portion 32b is rotated to the rear position (the position shown by the broken line in FIG. 12) of the lock 3 to lock the lock 3 by making it impossible to retreat. In this case, the turning lever 29 is given a turning force in the clockwise direction in FIG. 12 by the coiled return spring 30, so that the lock 32 is biased in the locking direction via the connection lever 31. Has been done.

Further, the lever shaft 28 (see FIG. 9) is fixed to the rotating lever 29 by screws 28 ', so that the rotating lever 29 rotates in conjunction with the lever shaft 28. As described above, the turning lever 29 is provided with the coil-shaped return spring 30 as an elastic member.
In FIG. 8, the turning force is urged in the clockwise direction, that is, the locking direction, and this urging force is applied via the lever shaft 28 in FIG.
8 is transmitted as the rotational force of the first drive lever 22, and the transmitted rotational force acts as a force for sliding the drive plate 24 to the left in the drawing, which is the locking direction, in FIG.

In FIG. 12 and the like, reference numeral 33 is a traction spring, one end of which is the cover 6a of the locking / unlocking portion 6.
(Refer to FIG. 9) is fixed to a mounting base 33a fixedly installed,
The other end is locked to the side surface of the lock 32, and the lock 32 is pulled around the support shaft 32a in the unlocking direction shown in FIG. 12, that is, in the direction in which the tip 32b of the lock 32 is rotated upward. is doing.

First, in the locked state, the front end portion 32b of the lock 32 is at the position shown by the chain double-dashed line in FIG. 2 drive eccentric cams 12, 13
The long diameter portion (see FIGS. 8 and 9) is located at the left side of the drawing as shown in FIG. 13, and therefore the first and second locking pins 25 and 26 fixedly mounted on the drive plate 24 are arranged on the drive plate. It is in a state of being slid to the left position where it comes into contact with the respective short diameter portions of the first and second drive eccentric cams 12 and 13 by the biasing force applied to 24.

In such a state, the first and second
When the operation signal is transmitted to the unlocking circuits 39a and 39b (see FIG. 1) of the main drive circuit, the main and sub-motors 10 and 11 (see FIG. 8 and FIG. 9) make a half rotation, and accordingly the first and second drive motors are driven. The long diameter portions of the eccentric cams 12, 13 half-rotate while locking the first and second locking pins 25, 26. As a result, the drive plate 24 that fixes the first and second locking pins 25 and 26 is pressed and slides to the right in the drawings in FIGS. 8 and 9. When the drive plate 24 slides to the right in the drawing, the first drive lever 22 rotatably attached to the drive plate 24 also rotates in the clockwise direction, and this rotation causes the drive plate 24 to be fixed. The rotation lever 28 shown in FIG. 12 rotates counterclockwise via the lever shaft 28 provided, and this rotation is performed via the connection lever 31.
2, the lock 32 is rotated clockwise.
By the rotation of the lock 32, the tip portion 32b thereof is positioned above the latch 3, and the latch 3 can be retracted, whereby the lock is unlocked.

In this case, the main and sub motors 1 are
Even if either 0 or 11 does not operate mechanically or due to a failure of the control mechanism described later, it can be unlocked by rotating either one of the motors. That is, in FIG. 8 and FIG. 9, either one of the motors rotates, and accordingly, the first and second drive eccentric cams 1 move.
This is because if either of the rotations 2 and 13 rotates, either of the first and second locking pins 25 and 26 is driven by this rotation and the drive plate 24 slides in the unlocking direction.

Next, the structure of the electronic time lock control mechanism according to the present invention will be described with reference to FIG. In the figure, this control mechanism B has a CPU 34, and a system memory 35 for storing a device control program and a timer 3 for timing are provided to this CPU 34 via a bus 34 '.
6, the numeric keypad 4a as an input unit for inputting data and the like, the liquid crystal display 4b as the display unit for digitally displaying the input data, a personal identification number of the operator, weekly program, holiday program, unlocking time A first EEPROM 37a and a second EEPROM 37b as data storage memories for storing data such as the above are connected. The first and second EEPROM 3
The same data is stored in 7a and 37b, and the CPU
When the data is read out under the control of 34, the stored contents are compared with each other, and the control based on the data is performed only when the contents match, thereby performing the error detection of the stored data. In addition, EE as a data memory
Since the PROM does not require a backup power supply to retain the memory, the stored content is retained even if the power is interrupted, for example, and the safety of data is ensured also from this aspect.

The bus 34 'further has a first calendar I.
C38a and a second calendar IC 38b, a first unlocking circuit 39a and a second unlocking circuit 39b for sending an operation signal to the main motor and the sub motors 10 and 11 (see FIG. 8, FIG. 9, etc.), and unlocking operation. A first locking / unlocking sensor 40a for detecting a lock (the micro switch 1
6, 17: see FIG. 5) and the second locking / unlocking sensor 40b.
(The micro switches 18 and 19: see FIG. 5), the first voltage monitoring circuit 41a for detecting the decrease in the voltage supplied to the CPU 34 and the main motor 10, and the decrease in the voltage supplied to the sub motor 11. Is connected to a second voltage monitoring circuit 41b for detecting

That is, the first calendar IC 38
a has the first and second EEPROM 3 when locked.
The data of the next unlocking time transferred from 7a, 37b is stored, and when the unlocking time comes, the first calendar IC 38a sends a signal to the CPU 34, and based on this, the first unlocking circuit from the CPU 34. An actuation signal is sent to 39a and the second unlocking circuit 39b. Further, the first calendar IC 38a directly sends an operation signal to the first unlocking circuit 39a without going through the CPU 34. Also, the second
Similarly, the data of the next unlocking time transferred from the first and second EEPROMs 37a and 37b at the time of locking is also stored in the calendar IC 38b of the second calendar IC 38b.
A signal is sent to the PU 34, and based on this, an operation signal is sent from the CPU 34 to the first unlocking circuit 39a and the second unlocking circuit 39b. Similarly, this second calendar IC38
b directly sends an operation signal to the second unlocking circuit 39b. The outputs of the first calendar IC 38a and the second calendar IC 38b are transferred to the bus 3 via the OR circuit 38c.
4 ', and even if either the first or second calendar IC 38a, 38b is inoperative due to a failure or the like, the first unlocking circuit and the second unlocking circuit 39a,
Since the unlocking is performed by sending the operation signal to one of the terminals 39b, the unlocking is prevented.

The first locking / unlocking sensor 40a is the bus 3
It is connected to the CPU 34 via 4'and directly to the first calendar IC 38a. Second
The locking / unlocking sensor 40b is also connected to the CPU 34 via the bus 34 'and directly to the second calendar IC 38b. In this case, while the locked state is detected by the first locking / unlocking sensor 40a and the second locking / unlocking sensor 40b, the first calendar I
It is prohibited to write the unlocking time into the C38a and the second calendar IC 38b.
It prevents the rewriting of data due to a malfunction caused by a runaway or memory abnormality.

The first voltage monitoring circuit 41a monitors the voltage supplied to the CPU 34 and the main motor 10 from the power supply section 42 which supplies electric power to each part of the apparatus, and when this voltage value falls below a predetermined value. Signal the voltage drop to the CP
The signal is sent to U34, and the CPU 34 receives this and sends an operation signal to the first and second unlocking circuits 39a and 39b.
The operating signal is directly sent to the second unlocking circuit 39b without going through. The second voltage monitoring circuit 41b monitors the voltage supplied from the power supply unit 42 to the sub motor 11, and when the voltage value drops below a predetermined value, sends a voltage drop signal to the CPU 34, and the CPU 34 In response to this signal, an operation signal is sent to the first and second unlocking circuits 39a and 39b. The outputs of the first voltage monitoring circuit 41a and the second voltage monitoring circuit 41b are input to the OR circuit 41c, and the output of the OR circuit 41c is input to the CPU 34.

In this way, the first voltage monitoring circuit 41a produces a voltage of a predetermined value or less (in this embodiment, + 5V driving causes + 4V).
When a voltage of V or less) is detected, an activation signal is sent from the CPU 34 to the first and second unlocking circuits 39a and 39b. In addition, the first voltage monitoring circuit 41a is
An actuation signal is directly sent to the second unlocking circuit 39b without passing through 4. Further, when the second voltage monitoring circuit 41b also detects a voltage lower than a predetermined value (a voltage of + 4V or less as described above), the CPU 34 sends an operation signal to the first and second unlocking circuits 39a and 39b. To be done. Receiving these actuation signals, the first unlocking circuit 39a and the second unlocking circuit 39b are actuated, and the main motor 10 and the sub motor 11 are rotated to actuate the locking / unlocking mechanism A to unlock. Be seen. As described above, when it is detected that the voltage supplied to the CPU 34, the main motor 10 and the sub motor 11 has dropped below a predetermined level, the unlocking operation is immediately started, which may make it impossible to unlock due to the voltage drop as in the conventional case. There is no such thing.

The first unlocking circuit 39a sends a signal when the unlocking time of the first and second calendar ICs 38a and 38b arrives, and the first and second voltage monitoring circuits 41.
The main motor 10 operates by receiving the operation signal from the CPU 34 which receives the signals from the a and 41b and the direct operation signal from the first calendar IC 38a.
Is rotated, and this rotation causes the locking / unlocking mechanism A to operate to unlock. The second unlocking circuit 39b sends a signal when the unlocking time of the first and second calendar ICs 38a, 38b arrives and sends a signal from the first and second rolling compaction monitoring circuits 41a, 41b. CPU34 received
And the direct operation signal from the first calendar IC 38b and the direct operation signal from the first voltage monitoring circuit 41a, the sub-motor 11 is rotated by this operation signal. The lock mechanism A operates to unlock.

The CPU 34 also has a sleep mode control unit (not shown), and this sleep mode control unit
In this embodiment, one minute has elapsed after the lock and unlock by the first and second lock / unlock sensors 40a and 40b are detected, and when the unlock time is set, etc., as shown in FIG. After a lapse of 1 minute without operating the numeric keypad 4a, the display power supplied from the power supply unit 42 to the liquid crystal display 4b is stopped, and C
The power consumption for the control operation of about 40 mm amps consumed by the PU 34 itself is reduced to about 5 μamps and the sleep mode is entered. This CPU34
Wakes up from the sleep mode when any one of the ten keys 4a shown in FIG. 7 is pressed to set the unlocking time and when the first and second calendar ICs 38a, 3
It is when the signal of the unlocking time from 9b is received, and by this, the CPU 34 exits the sleep mode, enters the control operation state again consuming the electric power of about 40 mm amperes, and supplies the electric power to the liquid crystal display 4b.

FIG. 2 shows the first locking / unlocking sensor 40a.
And, in order to save electric power, a minute current of about several μA is usually applied to the second locking / unlocking sensor 40b,
It is a sensor switch monitoring circuit that allows a current of about several mm amps to flow a stable sensor when the sensor is operating. The sensor switch monitoring circuit 44 has an identical circuit configuration for unlocking and locking, and FIG. 2 shows the sensor switch monitoring circuit for unlocking. In the figure, the unlocking sensor switch monitoring circuit 44 is composed of a pair of CMOS structure analog switches 45a and 45b which are turned on and off depending on the presence or absence of control signal reception, and a pair of CMOS structure NAND gates 46a and 46b. Has been done. The switch terminals W1, W2 and W3 are the same as those shown in FIG.
The switch terminals are interlocked with ON / OFF of the micro switches 16 to 19 shown in FIG.

Now, in the locked state, the switches W2-W3
Is connected, the NAND gate 46b
Has one input of L (low) and therefore this NA
The output of the ND gate 46b becomes H (high). This H output causes the two inputs of the NAND gate 46a to become H and its output to become L. Also, the analog switch 45
Since the control signal of a is H, the switch is turned on. On the contrary, since the control signal of the analog switch 45b is L, the switch is turned off. In this state, from a1 via the analog switch 45a and the resistor R,
A minute current of several μA continues to flow toward b1.

Here, the unlocking operation is performed and the switch is moved to W1.
At the moment of switching to -W2, a current of several mm amps flows from a1 to a3 to satisfy the minute current rating of the switch, and this current becomes the sensor output. That is, W
When the switch is switched to 1-W2, one input of the NAND gate 46a becomes L, and this output becomes H, so two inputs of the NAND gate 46b become H and the control signal of the analog switch 45b also becomes. It becomes H and the switch is turned on. Since the output of the NAND gate 46b becomes L, the control signal of the analog switch 45a also becomes L and the switch is turned off. This O
At the moment of becoming FF, a current of several mm amperes flows as described above, and this current becomes the output of the locking / unlocking sensor. After that, a state in which a current of about several μampere flows again continues. Thus, the current consumption is suppressed by allowing the necessary current to flow only at the moment of operation.

Next, the operation of the present invention will be described with reference to the flowcharts of FIGS. First, the setting of the unlocking time will be described. In the flowchart of FIG. 3, the unlocking time is set by the ten key 4a on the operation panel 4 shown in FIG. That is, when any one of the ten keys 4a is pressed to set the unlocking time, the sleep mode control unit operates to wake up the CPU 34 (step S1) and supply power to the liquid crystal display 4b. , Numeric keypad 4 under the control of CPU 34
Data such as the operator's personal identification number, management classification, weekly program, holiday program, and unlocking time are input from a. This input data is displayed on the liquid crystal display 4b, and the first EEPROM 37a and second E
It is written and stored in the EPROM 37b (step S2). The first EEPROM 37a and the second EEP
The same data is stored in the ROM 37b for error detection as described above.

In this way, the first EEPROM 37a
Under the control of the CPU 34, the data of the unlocking time that arrives first is sent to the first and second calendar ICs 38a and 38b at the same time as the locking, from the data regarding the unlocking time and the like stored in the second EEPROM 37b. It is written and written (step S3). This first EEPROM
When the data is read from the data 37a and the second EEPROM 37b, the first and second calendars I are read only when the both data are compared and coincident with each other, as described above.
Data errors are detected by transferring and writing the data to the Cs 38a and 38b. When this data input is completed, the ten key 4a
If 1 minute has passed without any operation for
Alternatively, the CPU 34 stops the supply of electric power to the liquid crystal display 4b when one minute has elapsed after being locked, and the CPU 34
The sleep mode in which only a small amount of electric power of about 5 μA flows from the control operation electric power of about 40 mm that has been flowing to 34 is entered (step S4).

Next, the unlocking operation when the unlocking time comes will be described with reference to the flowchart of FIG. First, the first calendar IC 38a and the second calendar IC 38b in which the next unlocking time is written counts the time (step S6), and when the unlocking time arrives (step S7), an operation signal is sent to the CPU 34. Is transmitted (step S8). The activation signal causes the CPU 34 to awaken (step S9). The awakened CPU 34 sends an actuation signal to the first and second unlocking circuits 39a and 39b based on the unlocking time signal from the first and second calendar ICs 38a and 38b (step S10). .

On the other hand, the first calendar IC 38
a sends an actuation signal directly to the first unlocking circuit 39a,
In addition, the second calendar IC 38b directly sends an operation signal to the second release circuit 39b (step S1).
1). Receiving these operation signals, the first unlocking circuit 39a
Sends an operation signal to the main motor 10, which causes the main motor 10 to rotate. In addition, the second unlocking circuit 39
Also in b, an operation signal is sent to the sub motor 11 to rotate the sub motor 11. The rotation of the main motor 10 and the sub motor 11 causes the locking / unlocking mechanism A as described above.
(See FIGS. 2 and 3) operates to complete unlocking (step S12).

Next, based on the flowchart of FIG. 5, C
The unlocking due to the decrease in the voltage supplied to the PU 34, the main motor 10 and the sub motor 11 will be described. First, the first voltage monitoring circuit 41a monitors the voltage supplied to the CPU 34 and the main motor 10 (step S13), and when it is detected that the voltage has dropped to +4 V or less in this embodiment (step S14). ), A signal is sent to the CPU 34, which causes the CPU 34 to awaken (step S15). The awakened CPU 34, based on the voltage drop signal, outputs the first and second unlocking circuits 39a and 39a.
An operation signal is sent to b (step S16). Receiving this operation signal, the first and second unlocking circuits are operated (step S17), whereby the main motor 10 and the sub motor 11 are rotated, and the locking / unlocking mechanism A is operated to unlock (step S17). S19). On the other hand, in step S14
When the voltage drop is detected at, the first voltage monitoring circuit 41a sends an actuation signal directly to the second unlocking circuit 39b (step S21). Receiving this signal, the second unlocking circuit 39b operates (step S22), whereby the sub motor rotates and the locking / unlocking mechanism A operates, thereby unlocking. A plurality of actuation signals are sent to the first and second unlocking circuits 39a and 39b, but they are actuated by receiving the earliest actuation signal.

The second voltage monitoring circuit 41b monitors the voltage supplied to the sub motor 11 similarly to the first voltage monitoring circuit 41a (step S19), and it is detected that the voltage has dropped to +4 or less. And (step S20), CP
A signal is sent to U34, which causes the CPU 34 to awaken (step S15). Hereinafter, step S1 of the above description
The unlocking is performed in the process from 6 to step 18.

FIG. 6 is a flowchart showing the procedure from unlocking to sleep of the CPU 34. In the figure, when the unlocking operation is performed (step S23), the unlocking is detected by the first unlocking sensor 41a (step S2).
6) The unlock signal is sent to the first calendar IC 38a and the CPU 34. When the second unlocking sensor 40b also detects unlocking, it sends an unlocking signal to the second calendar IC 38b and the CPU 34. The CPU 34 receives the unlocking signal and receives the first calendar IC 38a.
The data written in the second calendar IC 38b is constantly changed to unlock data (step S25). This prevents erroneous locking due to runaway of the CPU 34. When this writing is completed, the CPU 34 enters the sleep mode (step S26).

In the case of locking, by operating a predetermined key for locking on the operation panel 4 shown in FIG. 7, the first EEPROM 37a and the second EEPROM 37a
The next unlocking time is read from M37b and written in the first calendar IC 38a and the second calendar IC 38b, thereby resetting the transmission of the constantly unlocking signal of the first calendar IC 38a and the second calendar IC 38b. Next, the main motor 10 and the sub motor 11 are operated, the door (not shown) is closed here, and the handle (not shown) is operated to move the latch 3 forward to fit into the latch hole (not shown).
With the urging force (see FIGS. 9 and 12), each part of the device operates in a direction opposite to the direction of locking and is locked. In this case, as described above, the lock cannot be performed unless both the main motors 10 and 11 operate normally. That is, in FIG. 9, when either the main motor 10 or the sub motor 11 does not operate, the first and second driving cams 12, which lock the first and second locking pins fixed to the drive plate 24, This is because the drive plate 24 cannot slide in the unlocking direction as a result of one of the rollers 13 not rotating in the unlocking direction. This allows the failure of the locking / unlocking mechanism A or the control mechanism B to be detected before locking.

[0050]

As described above, according to the present invention, by duplicating the unlocking control system, not only one of the unlocking circuits has an abnormality, but also the unlocking of the CPU due to a runaway or memory abnormality. It is possible to realize an electronic time-lock control mechanism that can prevent the occurrence of an impossible state and prevent the lock from being disabled due to a voltage drop. When the locking / unlocking mechanism does not operate, CP
It is possible to reduce power consumption by reducing the power supplied to U to put it into a sleep mode and stopping the power supply to the display section, and thus the battery capacity of the power supply section can be reduced. Therefore, it is possible to realize an electronic time-lock control mechanism that enables downsizing of the device housing and setting of the unlocking time over a long period.

[Brief description of drawings]

FIG. 1 is a configuration block diagram of a control mechanism.

FIG. 2 is a circuit diagram showing a power saving mechanism of a locking / unlocking sensor.

FIG. 3 is a flowchart showing a setting procedure such as unlocking.

FIG. 4 is a flowchart when unlocking is performed when the unlocking time arrives.

FIG. 5 is a flowchart when unlocking is performed due to a voltage drop.

FIG. 6 is a flowchart from unlocking to CPU sleep.

FIG. 7 is a front external view of a time lock mechanism.

FIG. 8 is a front view of the internal mechanism in a state in which an operation panel as a casing of the time lock mechanism is removed.

9 is a cross-sectional view taken along the line AA of FIG.

FIG. 10 is a right side view.

11 is a cross-sectional view taken along the line BB of FIG.

FIG. 12 is a rear view of the time lock mechanism according to the present invention.

13 is a sectional view taken along the line AA of FIG. 2 in a locked state.

FIG. 14 is a view showing a state in which the chestnut is retracted after unlocking.

[Explanation of symbols]

 A ... Locking / unlocking mechanism B ... Control mechanism 1 ... Electronic time-locking mechanism 4 ... Operating panel 4a ... Numeric keypad 4b ... Liquid crystal display 9a ', Battery 9b', Battery 10, First drive motor (main motor ) 11 second drive motor (sub motor) 14 sensor eccentric cam 15 sensor eccentric cam 16-19 micro switch 34 central processing unit (CPU) 35 system memory 36 timer 37a first EEPROM 37b, 2nd EEPROM 38a, 1st calendar IC 38b, 2nd calendar IC 39a, 1st unlocking circuit 39b, 2nd unlocking circuit 40a, 1st unlocking sensor 40b, 2nd unlocking Lock sensor 41a, first voltage monitoring circuit 41b, second voltage monitoring circuit 42, power supply unit

Claims (4)

[Claims] 1. A system memory for storing a device control program, a timer for clocking, an input section for inputting data, an EEPROM as a data memory for storing data input from the input section, and the input data. It is an electronic time-lock control mechanism that has a display unit that displays such as, and that unlocks at a preset time under the control of the central processing unit and also has a dual unlocking control system. Drive motor and second drive motor for driving and unlocking, and a first unlocking circuit and an unlocking circuit for receiving the unlock signal and operating to control the first drive motor A second unlocking circuit that receives a signal and operates to control the second drive motor, and stores unlocking time data, and sends a signal to the central processing unit upon arrival of the stored unlocking time. Sending A first calendar IC for outputting the operating signal from the central processing unit to the first unlocking circuit and the second unlocking circuit and directly sending the operating signal to the first unlocking circuit.
And unlocking time data is stored, and when the stored unlocking time arrives, a signal is sent to the central processing unit, and the central processing unit outputs the first unlocking circuit and the second unlocking circuit. And a second calendar IC for sending an unlocking actuation signal directly to the second unlocking circuit. 2. The voltage supplied to the central processing unit, the first drive motor and the second drive motor is monitored,
When these voltages drop below a predetermined value, a signal is sent to the central processing unit, and an operating signal is sent from the central processing unit to the first unlocking circuit, and at the same time, the second
The electronic time-lock control mechanism according to claim 1, further comprising a voltage monitoring circuit for directly sending an operation signal to the unlocking circuit. 3. An unlocking and unlocking sensor for detecting unlocking and locking is provided, and when the unlocking or locked state is detected by the locking and unlocking sensor, the unlocking or locking is detected after the timer counts. The electric power supplied to the central processing unit after a lapse of a predetermined time is reduced from the electric power for control operation until then to the electric power for sleep mode, and for the control operation based on the signal transmission by the arrival of the unlocking time by the calendar IC. The electronic time lock control mechanism according to claim 1 or 2, further comprising a power saving mechanism for supplying electric power. 4. When the unlocking or locked state is detected by the locking / unlocking sensor, the power supply to the display unit is stopped after a predetermined time has elapsed since the unlocking or locking was detected by the timer. 4. The electronic time-lock control mechanism according to claim 3, further comprising a power-saving mechanism that starts power supply based on signal transmission when the unlocking time is reached by the calendar IC.