ELECTROMAGNETIC LOCK Russian patent published in 2014 - IPC E05B47/02 

FIELD: construction.

SUBSTANCE: coaxially in the lock body there is a fixator arranged as capable of longitudinal movement with a permanent magnet installed on its bottom, interacting with a head of a crossbar, in the lock body there is also an electromagnet with a coil and a core and a ball stop mechanism. A force pulled by a magnetic flow of the electromagnet is higher than the force developed by a magnetic flow of the permanent magnet. The lock is supplemented by a fixing bushing, connected by means of a threaded joint with a body, a conical magnetically conductive ring and also a magnetic shunt contacting with the permanent magnet along its external surface. The fixing bushing is made as stepped with two internal cylindrical surfaces of different diameters coupled to each other by a conical transition. The external side surface of the fixator includes the first cylindrical surface of smaller diameter coupled with the conical transition with the second cylindrical surface of the larger diameter and also the conical surface adjoining the latter and corresponding to the profile of the conical magnetically conductive ring. The internal hole of the fixator is made with a bore, the depth of which is equal to value of gripping of the crossbar head by balls of the stop mechanism, and the width of the bore is equal to the thickness of the crossbar head, at the same time the section of the stem adjoining the crossbar head has a circular bore of arched profile, the radius of which is equal or more than the radius of the stop mechanism balls.

EFFECT: electromagnetic lock makes it possible to increase reliability of operation.

2 cl, 3 dwg