JPH08100555A - Electronic lock - Google Patents

Abstract

PURPOSE: To reduce the number of working processes, by collating identification numbers and controlling unlocking or rewriting with a specific identification number in accordance with input of external signals, when a finished information of initialization has been written in areas. CONSTITUTION: An identification sign for initialization is written in the first area of EPROM 23 and a finished information of initialization is written in the second area respectively at the first starting time when the first driving electric power is supplied. When the finished information of initialization written in the EPROM 23 is confirmed in the next starting time, identification numbers are collated and unlocking motion is controlled or rewriting by the identification number given by the control signal of the identification number in the first are is performed, in accordance with the control signal input from an electronic key 30. When the identification number registered in the first area of the EPROM 23 coincides with the identification number from the electronic key 30, the electric source circuit to a stepping motor is connected for a specified time to supply electric power from the electronic key 30 side for a specified time. In this way, a movable piece engaging with a worm wheel is transferred to a required direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic lock that can be unlocked by inputting an external signal.

[0002]

2. Description of the Related Art Generally, in order to unlock a padlock or the like, a mechanical key is inserted from the lower surface or the front side of the main body and the key is rotated by a predetermined angle. The latch is forcibly retracted outside the locking hole in conjunction with the rotating cylinder. As a result, the locked state of the hooked portion with respect to the latch is released,
One end of the hook portion is biased to the outside of the main body and held in that state.

The electronic lock having the above functions has advantages that it can be constructed in a relatively small size and is easy to use.
For example, it is used for locking barns. However, although the above-mentioned lock using a mechanical key has the above-mentioned advantages, there is a problem in that the type of the key is restricted due to its structure and the like, a duplicate key is easily made, and security and safety are concerned.

Therefore, various electronic locks that can be opened and closed electronically without being restricted by the type of key and are excellent in security and safety have been proposed. The applicant also proposed a padlock type electronic lock. (Japanese Patent Application No. 6-207791).

An electronic lock is a non-volatile memory such as EE.
When the identification number preset in the PROM matches the identification number set in the content of the control signal sent from the electronic key side, the power supply path to the drive unit such as a stepping motor (not shown) is connected for a predetermined time. Power is supplied from the electronic key side (not shown) for a predetermined time,
It is unlocked by this drive unit.

[0006]

By the way, in the case of an electronic lock, a predetermined identification number at the time of manufacturing or shipping must be stored in the EEPROM, but in the conventional electronic lock, a dedicated jig is used. A method of writing a predetermined identification number in the memory by using it, or a method of operating the hardware to set the initial value setting mode and writing the identification number is adopted. Therefore, the number of working steps at the time of manufacturing or shipping is increased, and the working efficiency is lowered.

The present invention has been made in view of such circumstances, and an object thereof is to be able to write an initial identification number without requiring a specific work, thereby reducing the number of work steps and improving work efficiency. It is to provide an electronic lock that can be achieved.

[0008]

In order to achieve the above object, an identification number preset in a memory and an identification number set in an external signal input from the outside are collated, and when they match, the lock is performed. The electronic lock that drives the unit to unlock it writes the identification number set in advance in the first area of the memory for initialization at the first activation, and Write the information indicating that initialization is complete, and from the next startup,
When the initialization completion information is written in the second area of the memory, the collation and unlock control is performed or the identification number of the first area of the memory is rewritten according to the input of the external signal. It has a control unit to perform.

[0009]

According to the electronic lock of the present invention, when the driving power is first supplied to the electronic lock at the time of manufacturing or before shipment, the electronic lock is preset in the first area of the memory by the controller. The identification number is written and initialization is performed. In parallel with this, information indicating that the initialization is completed is written in the second area of the memory. Then, from the next start-up, the control unit checks whether or not the initialization end information is written in the second area of the memory, and if it is written, the external signal is input. Accordingly, collation and unlocking control of the identification number or rewriting of the identification number written in the first area of the memory by the identification number given by the external signal is performed.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 1 to 3 are cutaway views of an essential part showing an embodiment of a padlock type electronic lock according to the present invention. FIG. 1 shows a state when unlocked, and FIG. Figure showing the state of time, Figure 3
FIG. 3 is a sectional view taken along the line AA of FIG. In the figure,
10 is a lock body, 11 is a hook portion, 12 is a locking hole, 13
Is a spring for urging the hook portion, 14 is a mover, 15 is a latch as a locking portion, 16 is a spring for urging a latch, 17 is a stepping motor, 18 is a worm, 19 is a worm wheel, and 20 is an electronic circuit. Shows.

The lock body 10 has a substantially rectangular parallelepiped shape, and a cylindrical locking hole 12 having a diameter larger than the diameter on one end side of the hook portion 11 is formed on one side surface of the upper surface 10a, and one side surface of the upper surface 10a. A spring arranging hole having a hook urging hole 10b into which the other end 11b of the hook 11 is inserted and a hook urging spring 13 communicating therewith on the other side surface facing the 10c is formed, and a lower surface side 10d is formed with a connector hole 10e into which a connector portion of an electronic key (not shown) is inserted. Further, in a region between the locking hole 12 and the hook portion biasing hole 10b, the latch 14, the mover 15, the latch biasing spring 16, the stepping motor 17, the worm 18, and the worm wheel 19 are arranged. An electronic circuit 20 is arranged below these.

The hook portion 11 has a continuous ring shape, and an engaged portion 11a which is cut out in a substantially L-shape is formed on the inner wall on one end side. The other end side 11b is the hook portion urging hole 1
0b is urged upward (axial direction) in the figure by the hook portion urging spring 16 in the state of being inserted into 0b so that one end side is positioned outside the main body when unlocked as shown in FIG. Energized. The other end side 11b of the hook portion 11 is prevented from coming off from the hole 10c, and at the time of unlocking shown in FIG. 1, the other end side 11b is rotatable around the shaft. Then, at the time of locking, as shown in FIGS. 2 and 3, one end side where the locked portion 11a is formed is inserted into the locking hole 12 formed in the main body. At this time, as shown in FIG. 2, the hook portion biasing spring 13 receives the pressing force from the other end side 11b of the hook portion 11 and is in a contracted state.

The mover 14 has a shaft shape and is provided so as to be movable in a direction orthogonal to the axis of the locking hole 12, and a latch retainer 14a is formed at the tip end thereof, and a central portion in the axial direction thereof. 14b is formed on the
A boss 14c is partially formed on the outer peripheral surface on the rear end side.

The latch 15 is formed so as to be tapered from the upper and lower sides slightly below the central portion on the tip end side, and is in a locked state with the locked portion 11a formed on the hook portion 11 at the time of locking shown in FIG. Becomes As shown in FIG. 4, the latch section 15 has
A through hole 1 formed in the rear end surface 15a through which the axial center penetrates
5b is formed to have a diameter slightly larger than the diameter of the moving element 14, and the remaining through hole 15c is formed to have a diameter slightly larger than the diameter of the latch retainer 14a formed at the tip of the moving element 14. ing.

The latch urging spring 16 is provided between the flange 14b of the moving element 14 and the rear end surface 15a of the latch 15 so that the moving element 14 can be moved.
Is arranged so that the latch 15 is inserted therethrough, and biases the latch 15 to the locking hole 12 in a direction orthogonal to the hole axis with a biasing force smaller than the insertion force of the hook portion 11 into the locking hole 12. FIG. 4A shows the output state, and FIG.
Indicates a sinking state, that is, a retracted state. Also, FIG.
Shows a state in which the latch 15 is temporarily retracted from the locking hole 12.

A worm 18 is attached to the shaft of the stepping motor 17, and a worm wheel 19 meshing with the worm 18 is provided so that the shaft thereof is orthogonal to the shaft of the moving element 14. A boss 14c formed on the moving element 14 is engaged with the outer peripheral portion of the worm wheel 19 excluding the axial center. The stepping motor 17 starts operating when a control signal is sent from the electronic key side with the connector portion of the electronic key (not shown) inserted from the lower surface side 10d of the main body 10.

As shown in FIG. 6, the electronic circuit 20 is composed of an electronic key connection section 21, a CPU 22, and an EEPROM 23 which is a non-volatile memory. CPU
As shown in FIG. 7, reference numeral 22 denotes a first area 23 of the EEPROM 23 shown in FIG. 8 at the time of the first start-up when the first drive power is supplied during manufacturing or before shipment.
An identification number preset to 1, such as "000
"0" is written and initialization is performed (S1, S
2), information indicating that the initialization is completed is written in the second area 232 of the EEPROM 23 (S3). Then, from the next start-up, it is confirmed whether or not the initialization end information is written in the second area 232 of the EEEPOM 23, and if a positive confirmation result is obtained, FIG.
In accordance with the input of the control signal input from the electronic key 30 as shown in FIG.
Rewriting is performed by the identification number given by the control signal of the identification number of the first area 231 of the EPROM 23 (S
4). A plurality of identification numbers can be registered in the first area 231 of the EEPROM 23.

The identification number collation command and the rewriting command by the electronic key 30 are issued as follows, for example. First, when the collation command is transmitted with the connector section 31 connected to the connector section 10e of the lock body 10, the identification number, for example, "0000" is input by the ten-key operation section 32, and then "#" is input. input. When sending a rewrite command, after inputting "*", input the desired identification number, for example, "2458",
Then enter "#".

Specifically, the EEPRO is received in response to the collation command.
When the identification number registered in the first area 231 of M23 and the identification number input from the electronic key 30 match,
A power supply path to the stepping motor 17 (not shown) is connected for a predetermined time (for example, a hall element for detecting a predetermined position is used), and electric power is supplied from the electronic key 30 side for a predetermined time.

When electric power is supplied to the stepping motor 17 to start rotation, the worm wheel 19 rotates via the worm 18, and the boss 14c of the moving element 14 engaged with the worm wheel 19 makes an eccentric movement, Mover 1
4 moves away from the locking hole 12 once. Along with this, the latch 15 temporarily retreats from the locking hole 12.
FIG. 5 shows a state in which the latch 15 is temporarily retracted from the locking hole 12. Further, with the eccentric movement of the boss 14c, the mover 14 once moved away from the locking hole 12
Moves to a certain position, then moves again toward the locking hole 12, and the latch 15 is positioned inside the locking hole 12 again. This operation is performed within the time when the power supply path is established.

Next, the operation of the above configuration will be described. For example, when manufacturing and assembling are completed, one end of the hook portion 11 is inserted into the locking hole 12 for locking. As a result, as shown in FIG. 4B, the tip of the latch 15 is pressed by the one end of the hook 11, and the latch 15 is urged by the spring 16 to be positioned in the locking hole 12. Is once retracted from the locking hole 12. Then, the locked portion 11a of the hook portion 11 that is further inserted is the latch 1
The latch 15 is urged so as to be located in the locking hole 12 when it comes to a position facing the retreat opening of No. 5. As a result, the concave latched portion 11a is locked to the convex latch 15 and the locked state as shown in FIG. 2 is obtained. At this time, since the stepping motor 17 is in the non-operating state, the boss 14c of the moving element 14 is held at a predetermined position. Therefore, the movement of the moving element is suppressed while the moving element itself is locked.

Then, for example, in a pre-shipment test after manufacturing, at the first start-up when the first driving power is supplied to the CPU 22 of the electronic circuit 20, the CPU 22 causes the first area 231 of the EEPROM 23 to write to the first area 231. A preset identification number, for example, "0000" is written and initialized, and the EEPROM 23
Information indicating that the initialization is completed is written in the second area 232.

In order to release the locked state after confirming the settings or after shipping, the connector section 31 of the electronic key 30 is inserted from the connector section 10e on the lower surface side 10d of the lock body 10, and the electronic key 30 is kept in this state. From the side, the ten-key operation unit 32 inputs an identification number, for example, "0000", and then "#". As a result, a control signal as a verification command is sent to the CPU 22. At this time, for example, the identification number "0" preset in the first area 231 of the EEPROM 23 of the electronic circuit 20 is set.
000 ”and the content of the control signal sent from the electronic key side coincides with the set identification number, the power supply path to the stepping motor 17 (not shown) is connected for a predetermined time, and the electronic key 30 side supplies power for a predetermined time. Supply is made. When electric power is supplied to the stepping motor 17 to start rotation, the worm wheel 19 rotates via the worm 18, and the boss 14c of the moving element 14 engaged with the worm wheel 19 makes an eccentric motion, resulting in As shown in FIG. 5, the mover 14 moves in a direction in which it is once separated from the locking hole 12. Along with this, the latch 15 temporarily retreats from the locking hole 14. Further, with the eccentric movement of the boss 14c, the mover 14 once moved away from the locking hole 12
After moving to a certain position, is moved again in the direction approaching the locking hole 12, and the latch 15 is moved so as to be positioned in the locking hole 12 again.

When the identification number is rewritten, "*" is pressed from the electronic key 30 side by the ten-key operation unit 32.
Is entered, the desired identification number, eg, "245
By inputting “8” and then inputting “#”, a rewrite command is sent to the CPU 22. As a result, rewriting is performed with the identification number given by the control signal of the identification number of the first area 231 of the EEPROM 23.

As described above, according to this embodiment,
For example, at the time of the first start-up when the first drive power is supplied during manufacturing or before shipment, a preset identification number, eg, “0000” is written in the first area 231 of the EEPROM 23 for initialization. At the same time, information indicating that the initialization is completed is written in the second area 232 of the EEPROM 23, and whether or not the initialization completion information is written in the second area 232 of the EEPROM 23 from the next startup. If confirmation is made and a positive confirmation result is obtained, collation and unlock control of the identification number or identification of the first area 231 of the EEPROM 23 is performed in accordance with the input of the control signal input from the electronic key 30. Since the CPU 22 for rewriting with the identification number given by the number control signal is provided in the electronic circuit 20 of the electronic lock body 10, In it is not necessary to use a dedicated jig or special hardware when writing a predetermined identification number in EEPROM 23, there is an advantage that attained reduction in the number of working processes, improve the working efficiency.

Further, a locked portion 11a is formed on the side wall on one end side, the other end side 11b is biased inside the main body so that the one end side is located outside the main body 10 when unlocked, and the locked portion 11a is locked when locked. The hook portion 11 inserted into the locking hole 12 formed in the main body 10 and the boss 1 so as to be substantially orthogonal to the axis.
4c is formed and is provided so as to be movable in a direction substantially orthogonal to the insertion direction of the hook portion 11 into the locking hole 12, and a movable element 14 is moved to the tip side of the movable element 14 in the axial direction of the movable element 14. A latch 15 for locking the hooked portion 11a of the hook portion 11 that is inserted through the locking hole 12
A spring 16 that biases the latch 15 into and out of the locking hole 12 with a biasing force smaller than the force of inserting the hook portion 11 into the locking hole 12, and the boss 14c of the moving element 14 are engaged with each other to input an external signal. Stepping motor 17 operated by
And the worm 1 attached to the stepping motor shaft
8 and the worm 18 mesh with each other, and the boss 14c of the moving element 14
Since it has a worm wheel engaged in the part excluding the shaft center, it can be opened and closed electronically without being restricted by the type of key, realizing a padlock type lock with excellent safety and safety it can.

[0027]

As described above, according to the electronic lock of the present invention, it can be opened and closed electronically without being restricted by the type of key, and it is excellent in safety and security. There is an advantage that an electronic lock capable of reducing the number of working steps and improving working efficiency can be realized.

[Brief description of drawings]

FIG. 1 is a partial cutaway view showing an embodiment of a padlock type electronic lock according to the present invention, showing a state when unlocked.

FIG. 2 is a cutaway view of an essential part showing an embodiment of a padlock type electronic lock according to the present invention, showing a locked state.

FIG. 3 is a cross-sectional view taken along line AA of FIG.

FIG. 4 is a diagram for explaining an operational relationship between a hook portion and a latch.

FIG. 5 is a diagram showing a state in which the stepping motor is driven and the latch is retracted from the locking hole.

FIG. 6 is a block diagram showing a main configuration of an electronic circuit according to the present invention.

FIG. 7 is a flow chart for explaining a control operation of the CPU according to the present invention.

FIG. 8 is a diagram for explaining a storage area of an EEPROM according to the present invention.

FIG. 9 is an external view showing a configuration example of an electronic key according to the present invention.

[Explanation of Codes] 10 ... Lock Main Body 11 ... Hook Part 12 ... Locking Hole 13 ... Hook Part Energizing Spring 14 ... Moveer 14a ... Latch Detachment 14b ... Brim 14c ... Boss 15 ... Latch (Locking Part) 15a ... rear end surface 15b, 15c ... through hole 16 ... latch biasing spring 17 ... stepping motor 18 ... worm 19 ... worm wheel 20 ... electronic circuit 22 ... CPU 23 ... EEPROM 231 ... first area 232 ... second area 30 … Electronic key 31… Connector part 32… Numeric keypad operation part

Claims (1)

[Claims] 1. An electronic lock that collates an identification number preset in a memory with an identification number set in an external signal input from the outside and, if they match each other, drives a locking unit to unlock. Therefore, at the time of the first start-up, the preset identification number is written in the first area of the memory to perform initialization, and the information indicating that the initialization has been completed in the second area of the memory. When the initialization end information is written in the second area of the memory from the next startup, the collation and unlock control or the memory of the memory is started according to the input of the external signal. An electronic lock having a control unit for rewriting the identification number of the first area.