Door locking devices

Details Door locking devices Door locking devices

E - Fixed Constructions

05

C

70/3

E05C 19/16 (2006.01) E05C 17/56 (2006.01)

Patent

CA 2022371

- 26 - ABSTRACT Disclosed herein is a door locking device wherein first and second field magnets are disposed at respective stationary positions opposite to each other through an axial air gap; the first field magnet has 2P (P: an integer of at least 2) contiguous poles of alternating N and S polarity and is formed in a torus shape; the second field magnet has n pole(s) (n: an integer of at least 1) of alternating N and S poles and is formed so as to define a space capable of receiving a swingable driven gear in the plane opposite to a rotatable coreless armature and hence not to become a complete torus form; a rotatable coreless armature is rotatably provided between the first and second field magnets; a commutator is provided on the rotatable coreless armature so as to rotate integrally therewith; brushes coming into movable contact with the commutator are provided on its corresponding stationary side; a driving gear rotating integrally with the rotatable coreless armature is disposed concentrically with the armature; a back yoke for the second field magnet is extended and bent to define a swingable driven gear- receiving space; the swingable driven gear is engaged with the driving gear so that it may be received and disposed in the swingable driven gear-receiving space; and an out- put lever is swingably attached to the output gear shaft.

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