Patent ID: 11905738
Assignee: NANJING EASTHOUSE ELECTRICAL CO., LTD.
Field: Civil engineering (Other fields)
Classification: CPC E  F  G | IPC E  F

Claim 5:
6. An electronic door lock having a bi-directional overrunning clutch, comprising:
a first locking mechanism, wherein the first locking mechanism drives an inner wheel through a first torque to rotate a rotatable shaft to operate a locking device on a door by a user from an outside;
a second locking mechanism, wherein the second locking mechanism drives the inner wheel through the first torque to operate the locking device on the door by the user from an inside;
a third locking mechanism, wherein the third locking mechanism drives an outer wheel rotatable coaxially around the rotatable shaft through a second torque to operate the locking device on the door by the user electronically; and
the bi-directional overrunning clutch, an overrunning clutch mechanism comprises a magnetic face plate, a first embedded straight edge and a second embedded straight edge forming an acute angle on a first surface of the outer wheel, a magnetic pin attached magnetically and moveable on the magnetic face plate, and the inner wheel, wherein the inner wheel defines a plurality of notches equally spaced around an outer edge of the inner wheel, wherein when the outer wheel is rotating, one of the first and the second embedded straight edges presses the magnetic pin inward to engage the outer wheel with the inner wheel through one of the plurality of notches to drive the inner wheel to rotate along with the outer wheel, and when the inner wheel is rotating, one of the plurality of notches pushes the magnetic pin outward to disengage the inner wheel from the outer wheel and the outer wheel does not rotate along with the inner wheel and the rotatable shaft, and when the outer wheel rotates at the second torque, the inner wheel and the rotatable shaft rotate along with the outer wheel, and when the inner wheel rotates at the first torque, the outer wheel does not rotate along with the inner wheel and the rotatable shaft.