Magnetic sensor for lock position
AssigneeASSA ABLOY Residential Group, Inc.
InventorsShannon Petty, Aaron Treger
Life of this patent
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Abstract
According to some exemplary embodiments described herein, a door lock may include a driveshaft operatively couplable to a bolt configured to move between an extended position and a retracted position to selective secure an associated door. The door lock may also include a transmission coupled to the driveshaft, where the driveshaft includes at least one gear configured to rotate with the driveshaft. The door lock may also include a magnetic encoder coupled to the transmission and configured to measure a position of the at least one gear. The magnetic encoder may include a diametrically polarized magnet coupled to the at least one gear.
Claims20
A door lock comprising:
- a driveshaft operatively couplable to a bolt;
- a transmission coupled to the driveshaft, wherein the transmission includes at least one gear configured to rotate with the driveshaft;
- and
- a magnetic encoder coupled to the transmission and configured to output at least one value indicative of a position of the at least one gear;
- wherein the transmission reduces rotations of the driveshaft to rotations of the magnetic encoder in an N:1 ratio, wherein N is greater than 1 and less than or equal to 10.
A door lock comprising:
- a driveshaft operatively couplable to a bolt;
- a transmission coupled to the driveshaft, wherein the transmission includes at least one gear configured to rotate with the driveshaft;
- and
- a magnetic encoder coupled to the transmission and configured to output at least one value indicative of a position of the at least one gear;
- wherein:
- the signal is a non-incremental signal;
- and
- the at least one processor is configured to determine the position of the driveshaft following an erasure of memory associated with the at least one processor based on the non-incremental signal.
A method of operating a door lock, the method comprising:
- rotating a driveshaft to move a bolt of the door lock between an extended position and a retracted position, wherein rotating the driveshaft includes:
- rotating a transmission coupled to the driveshaft, wherein the transmission includes at least one gear coupled to the driveshaft, and
- rotating a magnetic encoder coupled to the at least one gear;
- determining a position of the driveshaft, wherein determining the position of the driveshaft comprises determining a position of the at least one gear using the magnetic encoder;
- generating a signal indicative of a position of the at least one gear;
- and
- transmitting the signal to a processor;
- wherein the signal is a non-incremental signal;
- and
- wherein the signal is indicative of the position of the at least one gear following an erasure of memory associated with the processor.
Dependencies are inferred from the claim text.