Electromechanical lock utilizing magnetic field forces

• US 10,443,269 B2
• Filed: 07/11/2016
• Issued: 10/15/2019
• Est. Priority Date: 07/13/2015
• Status: Active Grant

• Current Assignee: iLOQ Oy
• Original Assignee: iLOQ Oy
• Inventors: Piirainen, Mika, Pukari, Mika
• Primary Examiner(s): Barrett, Suzanne L
• Application Number:
  US15/742,581
• Publication Number:
  US 20180202193A1
• Time in Patent Office: 1,191 Days
• Field of Search: 70276
• CPC Class Codes: E05B 2047/0017 with rotary motion
• CPC Class Codes: E05B 2047/0057 Feeding
• CPC Class Codes: E05B 2047/0058 by batteries
• CPC Class Codes: E05B 2047/0062 by generator
• CPC Class Codes: E05B 2047/0064 by solar cells
• CPC Class Codes: E05B 2047/0081 Same pulse to lock or unlock
• CPC Class Codes: E05B 2047/0084 Key or electric means; Emergency release
• CPC Class Codes: E05B 2047/0093 including means for preventing manipulation by external shocks, blows or the like
• CPC Class Codes: E05B 2047/0094 Mechanical aspects of remotely controlled locks electronic locks G07C9/00
• CPC Class Codes: E05B 2047/0095 Mechanical aspects of locks controlled by telephone signals, e.g. by mobile phones electronic locks G07C9/00
• CPC Class Codes: E05B 47/0012 with rotary electromotors actuators with rotary electromotors per se H02K7/06, H02K23/68
• CPC Class Codes: E05B 47/0038 using permanent magnets
• CPC Class Codes: E05B 47/0044 Cylinder locks with magnetic tumblers E05B47/0041, E05B47/0042 take precedence
• CPC Class Codes: E05B 47/0615 operated by handles, e.g. by knobs
• CPC Class Codes: E05B 47/063 with a rectilinearly moveable blocking element
• CPC Class Codes: E05B 47/0649 with a rectilinearly moveable coupling element
• CPC Class Codes: E05B 47/0669 with a pivotally moveable blocking element
• CPC Class Codes: E05B 47/0673 with a rectilinearly moveable blocking element
• CPC Class Codes: E05B 47/0692 with a rectilinearly moveable coupling element
• CPC Class Codes: H02K 49/104 Magnetic couplings consisting of only two coaxial rotary elements, i.e. the driving element and the driven element

Abstract

Electromechanical lock utilizing magnetic field forces. An actuator is moved between a locked position and an unlocked position. In the locked position, a first permanent magnet directs a first magnetic field exerting a pushing force so that rotation of the first axle is blocked, and a second permanent magnet directs a second magnetic field exerting a pulling force so that the first axle is kept uncoupled with the second axle. In the unlocked position, the first permanent magnet directs a reversed first magnetic field exerting a pulling force so that the first axle is released to rotate, and the second permanent magnet directs a reversed second magnetic field exerting a pushing force so that the first axle becomes coupled with the second axle.

Claims

1. An electromechanical lock comprising:

a lock body;

a first axle configured to be rotatable;

a first permanent magnet pin coupled with the first axle;

a second permanent magnet pin coupled with the first axle;

a second axle configured to be rotatable;

an actuator configured to move between a locked position and an unlocked position;

a first permanent magnet coupled with the actuator; and

a second permanent magnet coupled with the actuator;

wherein

the first axle and the second axle are configured to be couplable with each other, and

in the locked position, the first permanent magnet is configured to direct a first magnetic field exerting a pushing force to move the first permanent magnet pin into a contact with the lock body so that rotation of the first axle is blocked, and the second permanent magnet is configured to direct a second magnetic field exerting a pulling force to move the second permanent magnet pin so that the first axle is kept uncoupled with the second axle, whereas,

in the unlocked position, the first permanent magnet is configured to direct a reversed first magnetic field exerting a pulling force to move the first permanent magnet pin so that the first axle is released to rotate, and the second permanent magnet is configured to direct a reversed second magnetic field exerting a pushing force to move the second permanent magnet pin so that the first axle becomes coupled with the second axle.

2. The electromechanical lock of claim 1, wherein the first axle is configured to receive rotation by a user and the second axle is permanently coupled with a latch mechanism.

3. The electromechanical lock of claim 1, wherein the first axle is permanently coupled with a latch mechanism and the second axle is configured to receive rotation by a user.

4. The electromechanical lock of claim 1, wherein the first permanent magnet and the second permanent magnet are configured to move in a synchronous manner in relation to each other as the actuator moves between the locked position and the unlocked position.

5. The electromechanical lock of claim 1, wherein the actuator comprises a rotating shaft configured to move between the locked position and the unlocked position by a predetermined amount of rotation or counter-rotation.

6. The electromechanical lock of claim 1, wherein movement directions of the first permanent magnet pin and the second permanent magnet pin are at an angle between 30 and 150 degrees to each other.

7. The electromechanical lock of claim 1, wherein the actuator is configured to move between the locked position and the unlocked position as follows:

the first permanent magnet is moved such that a first pole of the first permanent magnet takes the place of a second pole of the first permanent magnet, and the second permanent magnet is moved such that a first pole of the second permanent magnet takes the place of a second pole of the second permanent magnet.

8. The electromechanical lock of claim 1, wherein

the first permanent magnet is configured to direct the first magnetic field exerting the pushing force to move the first permanent magnet pin due to the poles of the first permanent magnet and the first permanent magnet pin being similar to each other,

the second permanent magnet is configured to direct the second magnetic field exerting the pulling force to move the second permanent magnet pin due to the poles of the second permanent magnet and the second permanent magnet pin being opposite to each other,

the first permanent magnet is configured to direct the reversed first magnetic field exerting the pulling force to move the first permanent magnet pin due to the poles of the first permanent magnet and the first permanent magnet pin being opposite to each other, and

the second permanent magnet is configured to direct the reversed second magnetic field exerting the pushing force to move the second permanent magnet pin due to the poles of the second permanent magnet and the second permanent magnet pin being similar to each other.

9. The electromechanical lock of claim 1, wherein the first axle and the second axle are configured so that the first axle is at least partly fitted inside the second axle.

10. The electromechanical lock of claim 1, wherein the first permanent magnet pin is coupled with the first axle so that the contact with the lock body takes place outside of the second axle, and the second permanent magnet pin is coupled with the first axle so that the first axle becomes coupled with the second axle inside the second axle.

11. The electromechanical lock of claim 1, wherein the lock body comprises a notch configured to hold the first permanent magnet pin, and, in the locked position, the first permanent magnet pin is moved into the notch of the lock body so that the rotation of the first axle is blocked.

12. The electromechanical lock of claim 11, wherein the lock body further comprises a plurality of further notches configured to hold the first permanent magnet pin, and, if the electromechanical lock is subjected to an external break-in force, which releases the first permanent magnet pin from the notch of the lock body, and the first axle starts to rotate, the first permanent magnet pin is configured to enter into one of the further notches of the lock body, whereby the first axle stops to rotate.

13. The electromechanical lock of claim 1, wherein the second axle comprises at least one notch configured to receive the second permanent magnet pin in the unlocked position.

14. The electromechanical lock of claim 1, wherein the electromechanical lock further comprises, coupled with either the first axle or the second axle, one of a knob, a door handle or a keyway.

15. The electromechanical lock of claim 1, wherein the electromechanical lock further comprises an electronic circuit configured to read data from an external source and match the data against a predetermined criterion, and, provided that the data matches the predetermined criterion, the actuator is configured to move from the locked position to the unlocked position.

16. The electromechanical lock of claim 1, further comprising further first permanent magnets coupled with the actuator, and further first permanent magnet pins coupled with the first axle,

wherein

in the locked position, the further first permanent magnets are configured to direct further first magnetic fields exerting further pushing forces to move the further first permanent magnet pins into further contacts with the lock body so that the rotation of the first axle is blocked, whereas,

in the unlocked position, the further first permanent magnets are configured to direct further reversed first magnetic fields exerting further pulling forces to move the further first permanent magnet pins so that the first axle is released to rotate.

17. A method in an electromechanical lock comprising:

moving an actuator between a locked position and an unlocked position;

in the locked position, directing, by a first permanent magnet, a first magnetic field exerting a pushing force so that rotation of a first axle is blocked, and directing, by a second permanent magnet, a second magnetic field exerting a pulling force so that the first axle is kept uncoupled with a second axle; and

in the unlocked position, directing, by the first permanent magnet, a reversed first magnetic field exerting a pulling force so that the first axle is released to rotate, and directing, by the second permanent magnet, a reversed second magnetic field exerting a pushing force so that the first axle becomes coupled with the second axle.