JP2532260B2 - Electronic cylinder-lock - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention is an electronic cylinder lock that is locked and unlocked by an electric signal so that electric power for operating an electronic circuit in the cylinder lock is supplied from a key. It relates to electronic cylinder locks.

(B) Conventional technology In contrast to the conventional mechanical cylinder lock that operates by mechanical key cryptography, an electronic cylinder lock in which an electric code generated from an electronic circuit is used as a code is filed by the present inventor in Japanese Patent Application No.
Proposed in −240564.

In this conventional technique, a battery is built in the cylinder lock as a power source.

(C) Problems to be solved by the invention In the case of the type in which the battery is built into the cylinder lock, specialized knowledge is required to replace the battery, so replacement by a specialist is required once every several to 10 years. There was a problem I needed.

(D) Means for solving the problem In order to solve the difficulty of battery replacement, the internal battery should be removed and the power supply from the external electronic key power supply should be locked and unlocked in the required amount each time. For that purpose, we devised a high-efficiency and pollution-resistant power transmission method.

By eliminating the battery in the cylinder lock in this way, the problem of battery replacement was eliminated.

Power can be supplied from the electronic key to the cylinder lock by three coupling methods such as electric capacity coupling, electromagnetic coupling, and contact coupling, but the present invention adopts the electromagnetic coupling method as a highly efficient method that is resistant to dirt. .

(E) Operation In order to transmit electric power with high efficiency by electromagnetic coupling, it is necessary to properly make a path for magnetic field lines that links between the primary coil and the secondary coil. Therefore, a magnetic circuit is formed with a material having a high magnetic permeability so that the voids are reduced as much as possible to form a magnetic circuit, and the function as a cylinder lock that locks and unlocks by rotating a key is satisfied. This satisfies the two functions of high transmission efficiency and key rotation.

(F) Embodiments The invention will be described below with reference to the drawings.

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

In FIG. 1, (a) is a side sectional view and (b) is a longitudinal sectional view.
Is an electronic key, 2 is a rotatable inner cylinder of a cylinder lock, 3 is an outer cylinder supporting the inner cylinder 2, 4 is a magnetic path made of a material of high magnetic permeability provided in the inner cylinder 2, and 5 is an outer cylinder. A magnetic path made of a material having a high magnetic permeability provided in the cylinder 3, 6 is a coil wound around the magnetic path 5, 7 is an electronic circuit which operates by receiving electric power from an electronic key, and 8 is an inner cylinder 2 and the outside. A pin for coupling with the cylinder 3 and freeing rotational movement, 9 is an electromagnetic actuator for moving the pin 8 by a signal from an electronic circuit, and 10 is a hole provided in the inner cylinder 2 for receiving the pin 8. .

FIG. 2 is a vertical sectional view when the inner cylinder is rotated by the electronic key. If the electronic key 1 is a legitimate key, the signal of the key code generated by the electronic key 1 is decrypted by the electronic circuit 7, and in the case of the legitimate key, a signal is sent to the actuator 9 to operate the pin 8 and The inner cylinder 2 of the cylinder lock is made rotatable by being pulled out from the hole 9 of the inner cylinder 2, and the inner cylinder 2 is manually rotated by the electronic key 1.

FIG. 3 is a simplified cross-sectional view showing the inside of the electronic key 1, 11 is a coil for transmitting electric power and signals, 12 is an electronic circuit for supplying electric power and signals to the coil, and 13 is the electronic key 1 in the keyhole. A sensor switch 14 that senses and operates is a power supply.

 It will be described with reference to the drawings.

This cylinder lock is the same as a general cylinder lock, and is designed so that the key cannot be removed unless the keyhole is in a certain position. This position is arbitrary, but in general, it is often a vertical position.

FIG. 1B 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 a magnetic material is provided so as to be orthogonal to the keyhole. The magnetic path 5 is opposed to the magnetic path 4.
Is provided. The magnetic path 5 is linked to the coil 6. The ends of the magnetic path 4 and the end of the magnetic path 5 are finished so that there are as few voids as possible.

Now, when the electronic key 1 is inserted to the predetermined position in the keyhole,
The sensor switch 13 operates to supply power to the electronic circuit 12 from the power supply 14. The electronic circuit 12 then sends an alternating current to the coil 11. A combination of a reed switch and a permanent magnet is generally used as a sensor switch. An alternating magnetic flux flows through the magnetic paths 4 and 5 by the magnetic field generated by the coil power source, and an induced voltage is generated in the coil 6. Magnetic path 4 at this time
And 5 serve to make the coupling between coil 11 and coil 6 tight. The gaps formed between the coil 11 and the magnetic path 4 and between the magnetic path 4 and the magnetic path 5 are within a range that does not hinder the relative rotational movement of the inner cylinder 2 with respect to the outer cylinder 3 and the electronic key 1. It is selected as small as possible within a range that does not hinder the movement in the inner cylinder 2.

In this way, the magnetic flux generated by the magnetic field generated by the coil 11 is efficiently guided to the coil 6. The magnetic flux 4 and the magnetic flux 5 function like an iron core in a normal transformer.

When the electric power is efficiently transmitted from the coil 11 to the coil 6 in this way, the electric circuit operates the electronic circuit in the cylinder lock by the electric power to decipher the key code from the electronic key 1, and the actuator is regarded as a legitimate key. The pin 8 is pulled up by moving 9 and the inner cylinder 2 becomes free to rotate, and the electronic key 1 can be manually locked and unlocked.

In the state shown in FIG. 2, the electromagnetic coupling between the coil 11 and the coil 6 is very rough because the gap between the magnetic path 4 and the magnetic path 5 is large, and is not suitable for transmitting electric power. Although it is unsuitable, at this time, since the operation of pulling up the pin 8 has already been completed, it is not necessary to transmit electric power and no trouble occurs. When the electronic key 1 is pulled out from the keyhole, it cannot be pulled out unless the keyhole is made vertical again as shown in FIG. 1 (b). Therefore, when the electronic key 1 is pulled out, the magnetic path 4
And the magnetic path 5 are again tightly coupled, and the next electronic key 1
Is in a good condition for operation.

(G) Effect of the Invention With the above-described configuration, it becomes easy to supply power to the cylinder lock from the electronic key, and thus it is not necessary to provide a power source in the cylinder lock. It can solve the problem and its economic effect is remarkable.

[Brief description of drawings]

FIG. 1 is a simplified sectional view for explaining the present invention, (a)
Is a side sectional view, (b) is a longitudinal sectional view, FIG. 2 is a longitudinal sectional view when operated by an electronic key, and FIG. 3 is a diagram for explaining the electronic key. 1 ... electronic key, 2 ... inner cylinder, 3 ... outer cylinder, 4 ... magnetic path,
5 ... magnetic path, 6 ... coil, 7 ... electronic circuit, 8 ... pin, 9 ... actuator, 10, coupling hole, 11 ... coil, 12 ... electronic circuit, 14 ... power supply.

Claims (1)

(57) [Claims] 1. An electronic device comprising a rotatable inner cylinder and an outer cylinder supporting the inner cylinder, which is locked and unlocked by an electric signal, and an electronic key is manually rotated to rotate and unlock the inner cylinder. In the cylinder lock, the inner cylinder has a key hole, a magnetic path orthogonal to the key hole, and a hole for receiving a pin connecting the outer cylinder and the inner cylinder, and the outer cylinder faces the magnetic path of the inner cylinder. A magnetic path for forming a closed magnetic path, a coil wound around the magnetic path, an electronic circuit receiving electric power from the coil, the pin connecting the outer cylinder and the inner cylinder, and the electronic circuit An electronic cylinder lock, comprising: a drive device for operating the pin in response to a signal, wherein the electronic key is inserted into the key hole so that power is supplied from a battery built in the electronic key.