JPH01219269A - Electronic lock - Google Patents

Abstract

PURPOSE:To reduce the consumption of electric power by a method in which a dead bolt is provided with a coupler to move a movable iron piece to the holding position of a holding type electromagnet, and when moving the dead bolt manually, the movable iron piece is turned to restore the electromagnet to its holded state without use of electric power. CONSTITUTION:An electronic lock is made up of a dead bolt 1, a magnetic holding type electromagnet 4, a permanent magnet 5, a movable iron piece 7, a hook 8 to lock the bolt 1, a spring 11, a projection 12 to be coupled with the spring 11, and CPU 14. The bolt 1 is slid to the left or right manually by a handle 17. A key signal input from a card is directed to CPU 14, and electric current is sent to the electromagnet 4 to weaken the holding force of the magnet 5. The piece 7 is clockwise turned, the hook 8 is released, and the bolt 1 is made movable. When moving the bolt 1, the spring 11 is pushed up by the projection 12, and the piece 7 is counterclockwise turned. The piece 7 is attracted by the force of the magnet 5 for next locking.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to an electronic lock that locks and unlocks using electrical signals.

(0) Prior Art Conventional electronic locks lock and unlock using actuators such as electromagnets or electromagnetic solenoids that move in response to electrical signals.

(c) Problems to be solved by the invention Since the electronic lock described above consumes a lot of power for the actuator,
When using a battery-powered device or remotely controlling it by wire from a remote location, there are disadvantages such as shortened battery life and the need for thick electric wires.

(d) Means for Solving the Problems The present invention provides a power-saving and simple electronic lock that eliminates the above-mentioned disadvantages.

In order to achieve power saving, it is preferable to use a holding electromagnet, but the large power consumption required when electrically returning the holding electromagnet from the t-open state to the holding state must be reduced. For this purpose, the holding electromagnet is opened, the deadbolt is made movable, and while the holding electromagnet is moved manually to make the door openable, the holding electromagnet is Reduce power consumption by returning to the holding state without using power.

(Reference) Function The electronic lock of the present invention consumes power to open the holding electromagnet only when changing from locked to unlocked, and uses the movement of the deadbolt to return from unlocked to locked state. This is done using a holding electromagnet that is manually returned to the holding state, so no electricity is consumed.

Therefore, power consumption is low, so in the case of a battery type, the battery life is extended, and in the case of a wired type, the thickness of the wiring is reduced to reduce construction costs.

(f) Example The present invention will be explained below with reference to the drawings.

FIG. 1 is a simplified diagram showing the structure of an embodiment of the electronic lock of the present invention.

Figure 1 shows the case where the door is locked. 1 is a dead bolt, 2 is an outer casing of the lock, 3 is a strike, 4 is a magnetic holding type electromagnet, 5 is a permanent magnet, 6 is a spring, 7 is a movable iron piece of the holding type electromagnet 4, and 8 is a hook for locking the bolt l. , 9 is a pin that supports the hook 8, lO is a spring for pushing down the hook 8 and locking the bolt l, 11 is a spring attached to the movable iron piece 7, and 12 is a spring 11
a protrusion 13 on the bolt 1 provided in a position to engage with the
is a battery, and 14 is C that decodes the key code and controls the electromagnet 4.
A PU, such as Mitsubishi's M 50940.15, is a sensor for the state of the electromagnet 4, 16 is a switch circuit that sends the necessary current to the electromagnet 4 according to a command from the CPU, and 17 is a handle provided on the bolt 1.

FIG. 2 shows the key in FIG. 1 in an unlocked state.

FIG. 3 shows a state in which the bolt 1 is manually moved to the left from the state shown in FIG. 2, and the door can be opened.

FIG. 4 shows an example in which the present invention is applied to a rotating deadbolt, where 21 is a rotating bolt, 22 is a lock outer casing, 23 is a strike, 24 is a magnetic holding electromagnet, and 25 is an electromagnet 2.
4 is a permanent magnet, 26 is a spring of the electromagnet 24, and 27 is a movable iron piece of the electromagnet 24.

FIG. 5 shows another embodiment, in which 18 is a binion and 19 is a protrusion.

Now, to explain in detail, in FIG. 1, the movable iron piece 7 of the electromagnet 4 is attracted by the permanent magnet 5 and held at the holding position. No power is consumed in this state.

The hook 8 is rotatably attached to the bin 9, and is pressed down clockwise by a spring 10 to lock the bolt 1.

Bolt 1 is inserted into strike 3 and is in a locked state. The bolt l is provided with a handle 17 for moving it left and right in the figure. The handle 17 extends to the outside of the outer casing 2, and can be moved left and right by hand.

If the key signal input manually to the CPU 14 from a card or numeric keypad using a known method is correct, the CPU 14
U 14 controls the switch circuit 16 to send a current from the battery 13 to the electromagnet 4 to open it. This current flows in a direction that cancels the magnetic flux of the permanent magnet 5, weakening the holding force of the permanent magnet. . When this holding force becomes weaker than the force exerted by the spring 6, the movable iron piece 7 rotates clockwise in the figure, and its tip pushes down the hook 8 and rotates it counterclockwise. Then, the hook 8 moves from the position where the bolt 1 is locked, and the bolt 1 is unlocked and can be manually moved to the right. This state is shown in FIG.

The force of the spring 60 is chosen such that it can impart a rotational force on the hook 8 that is greater than and opposite to the force of the spring IO.

In the state shown in Figure 2, bolt 1 is manually moved 4 to the right, so if you manually move it to the right, bolt 1 and strike 3
The bond between the two is released and the door can be opened. This state is the third
As shown in the figure.

When the bolt 1 is manually moved during the transition from FIG. 2 to FIG. 3, the protrusion 12 pushes up the spring 11 and rotates the movable iron piece 7 in a counterclockwise direction. When the movable iron piece 7 rotates within the attraction range of the permanent magnet 5, the movable iron piece 7 is attracted by the attraction force of the permanent magnet 5 and is held in the state shown in FIG.

In this state, the movable iron piece 7 is separated from the hook 8 and does not apply any force to the hook 8. Therefore, the hook 8 is subjected to a clockwise rotational force by the spring IO. However, due to the presence of bolt l, it cannot rotate sufficiently and remains on bolt l.

If the bolt 1 is manually moved to the left from the state shown in FIG. 3, it will be in the state shown in FIG. 1. That is, when the hook 8 is moved from the pole 1 to the leftmost end, the hook 8 is automatically rotated clockwise by the spring 10 and locked.

Then, it returns to the locked state shown in FIG.

The state sensor 15 of the holding type electromagnet 4 is, for example, the movable iron piece 7.
It is made by a small permanent magnet mounted on top and a reed switch operated by this.

The role of this sensor is to correct the situation if the lock remains unlocked for an abnormally long time.

For example, if the user unlocks the electromagnet 4 by inputting information using a card, etc., and then goes somewhere else without opening the door for some reason, the door will be left unlocked. , is used in such cases to automatically lock the door after a certain amount of time has elapsed. In other words, after the CPU 14 understands through the sensor 15 that the lock is unlocked, the CPU
The electromagnet 4 is electrically returned to the holding state from U and locked.

In this way, the safety of the electronic lock is increased.

Next, another embodiment will be described with reference to FIG. Figure 4 shows an electronic lock using a rotary deadbolt, which is suitable for locking lockers or sliding doors.

The numbers assigned to each part in FIG. 4 correspond to the numbers of each part in FIG. 1, and are indicated by adding 20 to each number. That is, the pole 1 in FIG. 1 is the bolt 21 in FIG. 4, and the holding electromagnet 4 is the holding electromagnet 24 in FIG.

The functions of each part in FIG. 4 are the same as those of the corresponding parts in FIG. 1, and will be briefly explained below.

The bolt 1 in FIG. 1 locks and unlocks by moving left and right, but the bolt 21 in FIG. 4 locks and unlocks by rotating. In other words, rotating counterclockwise in the drawing means locking, and rotating clockwise means unlocking.

32 in FIG. 4 is the shoulder part of the pole 21, which plays the same role as the protrusion 12 in FIG. 1.

The one in Figure 4 has a particularly different effect from the one in Figure 1 when it is used for a sliding door. If it moves to the right at the top, bolt 21 and strike 23 will engage, so
I can't hear the sliding door to the right. In other words, it is also effective for sliding doors.

When the holding electromagnet 24 changes from the holding state shown by the solid line to the release state in FIG. 4, the movable iron piece 27 rotates clockwise in the process, and the hook 28 rotates counterclockwise to unlock the lock shown by the dotted line. state. If the handle 37 is rotated counterclockwise from this state, the bolt 21 will be rotated counterclockwise and will be in the state where the Wi-end is formed. At this time, in response to the rotation of the bolt 21, the shoulder portion 32 of the pole 21 pushes up the spring 31, causing the movable iron piece 27 to rotate counterclockwise, returning it to the holding state shown by the solid line again. That is, the engaging means for returning the movable iron piece of the holding type electromagnet to the holding position when the deadbolt moves as referred to in the present invention is the protrusion 12 shown in FIG.
It is not limited to protrusions such as the one shown in Figure 4) 21
Even if you cut out a part and create a shoulder-like part on the bolt, you can achieve the purpose. In this state, when the pole 21 rotates counterclockwise, the hook 28 is once pushed up counterclockwise by the slope of the pole 21, and then the hook 28 rotates clockwise at the position where the bolt 21 has finished rotating. Then, the locking operation is completed by returning to the position indicated by the solid line in FIG.

In the case of Fig. 4, like the one of Fig. 1, the energy when the holding electromagnet 27 returns from the open state to the locked state is obtained from the movement of the bolt, and the bolt is moved by hand. So, in the end, battery energy is not used.

FIG. 5 shows yet another embodiment. In this example, instead of the handle 17 directly connected to the bolt l shown in FIG. 1, the bolt 1 is provided with a rack mechanism, and a pinion 18 that engages with the rack mechanism is provided.

The pinion 18 is usually provided with a square hole, and the pinion 8 is rotated from the outside by a handle (not shown) connected to the square hole, thereby moving the bolt 1.

In the example shown in FIG. 6, the protrusion 1 is provided coaxially with the pinion 18.
9, the holding type electromagnet 4 is brought into a holding state. That is, when the bolt 1 moves to the right as the pinion 18 rotates, the spring 11 is pushed up by the protrusion 19, and the holding electromagnet 4 is held in the holding state. Of course, in Fig. 5, instead of the protrusion 19, there is a protrusion 1 on the bolt 1 as shown in Fig. 1.
Even if 2 is added, the effect of the invention is the same.

In short, in the present invention, a holding type electromagnet which is in an open state is brought into a holding state using some kind of mechanical interlocking mechanism in accordance with the movement of the bolt 1 at R171.

In the above explanation, an example using a magnetic holding type electromagnet has been explained, but the effect of the invention is the same even if a mechanical holding type electromagnet is used. Furthermore, although the example has been explained in which the engagement means is provided on both the movable iron piece and the deadbolt or bunion, if it is provided with elasticity, it is sufficient to provide it only on the deadbolt or the bunion, and there is no need to provide a spring for the movable iron piece. .

In general, holding type electromagnets require less power to open, but require a large amount of power to hold and attract. This is because during the holding operation, it is necessary to increase the magnetic flux density in the air gap while maintaining a large air gap.

In the present invention, re-holding is performed when the bolt is manually moved, thereby eliminating the need for large amounts of power for holding.

<g) Effects of the invention The present invention has the following effects.

The holding operation, which consumes a lot of power, from opening the holding electromagnet to returning it to the holding state, is performed when manually moving the bolt, so power consumption is extremely low.

Therefore, battery-powered batteries have a longer battery life and are easier to maintain.
The wiring type saves wiring costs and has a great economic effect.

[Brief explanation of the drawing]

FIG. 1 is a simplified structural diagram showing an embodiment of the present invention, FIGS. 2 and 3 are diagrams showing the unlocked state and the openable state, and FIG.
5 and 5 are simplified structural diagrams showing other embodiments, respectively. l, 21... Deadbolt, 4, 24...
・・Holding type electromagnet, 7.27・・・・Movable iron piece, 8
, 28... Hook, 11, 31... Spring, 12.32... Protrusion, 14.34...
...CPU, 16.36...Switch circuit,
18...binion, 19...protrusion. Patent applicant Representative of Kokusai Technological Development Co., Ltd.
Shunsaku Nakajiro Figure 1 1.21...Puntopol) 4.24
・River...Holding type electromagnet 7.27...Movable iron piece
8,28...Hook 11.31...
...Spring 12.32...
Protrusions 14, 34...cpu 1
6.36...Switch circuit field...Binion 19...Protrusion 2nd note 3 Figure flute S figure

Claims (3)

[Claims] (1) A manually moved deadbolt, means for locking the deadbolt, a holding electromagnet for driving the locking means, a switch circuit for sending current to the electromagnet when unlocking, and a key. The deadbolt is equipped with a CPU that determines the signal and controls the switch circuit, and the deadbolt is provided with an engaging means that moves the movable iron piece to a holding position of the electromagnet when the deadbolt is manually moved. electronic lock. (2) The electronic lock according to claim 1, wherein the deadbolt is of a rotary type. (3) A manually moved deadbolt, means for locking the deadbolt, a holding electromagnet for driving the locking means, a switch circuit for sending current to the electromagnet when unlocking, and a key. A CPU is provided to control the switch circuit that has determined the signal, and the deadbolt is provided with a rack mechanism and a pinion that engages with the rack mechanism, and when the deadbolt is manually moved, the movable iron piece is moved to the holding position of the electromagnet. An electronic lock characterized in that an engaging means is provided on the pinion.