JPH01121477A - Electronic cylinder lock - Google Patents

Abstract

PURPOSE: To dispense with a power source provided in a cylinder lock to dissolve difficulty of battery replacement by supplying electric power for actuating an electronic circuit in the cylinder lock, from a battery built in an electronic key, by an electromagnetic coupling system. CONSTITUTION: When an electronic key is inserted in a keyhole, electric power flows from a power source 14 to an electronic circuit 12 by the actuation of a sensor switch 13, and the circuit 12 feeds an alternating current to a coil 11. Alternating magnetic flux flows to magnetic paths 4, 5 in a cylinder lock by the magnetic field created by the coil 11 to generate induction voltage to a coil 6. An electronic circuit 7 in the cylinder lock is actuated by electric power transmission from the coil 11 to the coil 6, and cipher from the electronic key 1 is decoded. In the case of the right key, an actuator 9 is moved to draw a pin 8 up from a connecting hole 10 to make an inner cylinder 2 rotatable, and the electronic key 1 is manually rotated to lock and unlock.

Description

Detailed Description of the Invention (a) Industrial Application Field The present invention is an electronic cylinder lock that is locked and unlocked by an electric signal, in which power is supplied from the key to operate the electric circuit inside the cylinder lock. It is used between electronic cylinder locks.

(B) Prior Art In contrast to the conventional mechanical cylinder lock that operates using a mechanical key code, the present inventor filed a patent application in 1983 for an electronic cylinder lock that uses an electric code emitted from an electronic circuit as a code.
It was proposed in No.-240564.

In this invention, a battery is housed inside the cylinder lock as a power source.

(c) Problems to be solved by the invention Cylinder locks with a built-in battery require specialized knowledge to replace the batteries, so they should be replaced by a specialist once every few to 10 years. There was a problem that required it.

(d) Means to solve the problem In order to solve the difficulty of battery replacement, it is possible to eliminate the internal battery and obtain the necessary amount of power from an external electronic key source every time the lock is locked. To this end, we have devised a highly efficient and pollution-resistant power transmission method.

In this way, by eliminating the battery inside the cylinder lock, the problem of battery replacement is eliminated.

To supply power from the electronic key to the cylinder lock, there are three possible coupling methods: capacitive coupling, electromagnetic coupling, and contact coupling, but the present invention adopts the electromagnetic coupling method as it is resistant to dirt and has high efficiency. .

(4) Function In order to transmit power with high efficiency through electromagnetic coupling, it is necessary to skillfully create a path for the lines of magnetic force that interlink between the negative and secondary coils. For this reason, materials with high magnetic permeability are used.
To form a magnetic circuit with as few air gaps as possible and to satisfy the function of a cylinder lock which is locked and unlocked by rotating a key. This satisfies the dual effects of high transmission efficiency and key rotation.

(f) Example The invention will be explained below according to the drawings.

FIG. 1 is a simplified sectional view for explaining the structure of an embodiment of the present invention.

In Figure 1, (a) is a side sectional view, and (b) is a longitudinal sectional view, l is an electronic key, 2 is a rotatable inner cylinder of a cylinder lock, and 3 is an inner 1
An outer cylinder that supports 1r2, 4 is a magnetic path made of a material with high magnetic permeability provided inside the inner 112, 5 is a magnetic path made of a material with high magnetic permeability provided inside the outer 1113, and 6 is a magnetic path made of a material with high magnetic permeability provided inside the outer 1113. A coil is wound around the magnetic path 5, 7 is an electronic circuit that operates by receiving power from the electronic key, 8 is a coil that connects the inner tube 2 and the outer tube 113,
9 is an electromagnetic actuator that moves pin 8 by a signal from an electronic circuit;
is a hole provided in the inner cylinder 2 to receive the pin 8.

FIG. 2 is a longitudinal sectional view when the inner cylinder is rotated by the electronic key. If the electronic key 1 is a legitimate key, the electronic key 11
The key code signal issued by 10 is decoded by the electronic circuit 7, and if the key is a legitimate key, a signal is sent to the actuator 9, which is operated to remove the pin 8 from the hole 9 in the inner cylinder 2 of the cylinder lock. can be rotated, and the inner part 11F2 is manually rotated by the electron 111.

Figure 3 is a simplified cross-sectional view showing the inside of the electronic ill. 11 is a coil for transmitting power and signals, 12 is an electronic circuit that supplies power and signals to the coil, and 13 is a diagram indicating that the electronic ill has entered the keyhole. Sensor switch that senses and operates, 14
is the power source.

This will be explained according to the drawings.

This cylinder lock is the same as a regular cylinder lock, and is made so that the key cannot be removed unless the keyhole is in a certain position. Although this position is arbitrary, it is generally set in a vertical position.

FIG. 1(b) shows an example in which the key can be removed when the keyhole is vertical.

When the keyhole is vertical as shown in FIG. 1(b), the magnetic path 4 made of magnetic material is provided perpendicular to the keyhole. An end of the magnetic path 5 is provided opposite the magnetic path 4. 11! The path 6 interlinks with the coil 6. The ends of the magnetic path 4 and the end of the magnetic path 5 are finished so that there is as little air gap as possible.

Now, when electronic & 11 is inserted to the specified position in the keyhole,
The sensor switch 13 operates and supplies power to the electronic circuit 12.
Power is supplied from 14. The electronic circuit 12 then sends an alternating current to the coil ll. A common sensor switch is a combination of a reed switch and a permanent magnet. An alternating magnetic flux flows through the magnetic paths 4 and 5 due to the magnetic field generated by the coil power supply, and an induced voltage is generated in the coil 6. At this time, magnetic paths 4 and 5 are coils! 0 and the coil 6 tightly. Between the coil 10 and the magnetic path 4, and the magnetic path 4
The air gap generated between the magnetic path 5 and the outside 1113 is selected to be as small as possible within a range that does not impede the relative rotational movement of the inner cylinder 2 with respect to the outer 1113, and within a range that does not impede the movement of the electronic key 1 within the inner rII2. It will be done.

In this way, the magnetic flux due to the magnetic field created by the coil IO is efficiently guided to the coil 6. Magnetic flux 4 and magnetic flux 5 act like iron cores in a normal transformer. - When power is efficiently transmitted from coil 1O to coil 6 in this way, the electronic circuit inside the cylinder lock operates with this power, decrypts the key code from electronic key 1, and determines that it is a legitimate key. By moving the actuator 9, the pin 8 is pulled up and inside? lI2 can be rotated freely, and locking/unlocking is possible by manually turning the electronic key l.

In the state shown in Fig. 2, the electromagnetic coupling between the coil IO and the coil 6 is very rough due to the large air gap between the magnetic paths 4 and 5, making it difficult to transmit power. Although this is inappropriate, since the operation of pulling up pin 8 has already been completed at this time, there is no need to transmit power and no problem occurs. When pulling out the electron 111 from the keyhole, the keyhole must be made vertical again as shown in FIG. 1(b). Therefore, when electron [1 is extracted, magnetic path 4
and the magnetic path 5 are again tightly coupled, and the next electron mi
It is in good condition for operation.

(G) Effects of the Invention By having the above-described configuration, it is possible to easily supply power from the electronic key 1 to the cylinder lock, thereby eliminating the need to provide a power source in the cylinder lock, thereby eliminating the troublesome maintenance of batteries. This problem can be solved, and the economic effects are significant.

[Brief explanation of the drawing]

FIG. 1 is a simplified sectional view for explaining the present invention, and (a)
2 is a side sectional view, (b) is a sectional view of Kasuri, FIG. 2 is a vertical sectional view when operated by an electronic key, and FIG. 3 is a diagram for explaining the electronic key. l...Electronic key, 2...Inner cylinder, 3...
...outer cylinder, 4...magnetic path, 5...magnetic path, 6...coil, 7...electronic circuit, 8
...Pin, 9...Actuator, 1
0,... Connection hole, 11... Coil, 1
2...Electronic circuit, 14...Power supply. Patent applicant Representative of Kokusai Technological Development Co., Ltd.
Shunsaku Nakajiro Figure 2 Figure 3

Claims (1)

[Claims] An electronic cylinder lock consists of a rotatable inner cylinder and an outer cylinder that supports the inner cylinder, and is locked and unlocked by an electric signal.The inner cylinder has a keyhole, a magnetic path perpendicular to the keyhole, and an outer cylinder and The outer cylinder has a hole for receiving a pin connecting the cylinders, the outer cylinder has a magnetic path facing the magnetic path of the inner cylinder to form a closed magnetic path, and a coil wound around the magnetic path. It has an electronic circuit that receives power from the coil, the pin that connects the outer cylinder and the inner cylinder, and a drive device that operates the pin by a signal from the electronic circuit, and the electronic key is inserted into the keyhole. An electronic cylinder lock characterized by receiving power from a battery built into the electronic key.