US 11,913,812 B2
Control assembly for use in operation of an electric device
Cheng Chen Nieh, Chai Wan (HK); Chiu Keung Loong, Chai Wan (HK); and Wai Man Wong, Chai Wan (HK)
Assigned to Defond Electech Co., Ltd., Guangdong (CN); and Defond Components Limited, Chai Wan (HK)
Filed by Defond Electech Co., Ltd., Guangdong (CN); and Defond Components Limited, Chai Wan (HK)
Filed on Nov. 22, 2021, as Appl. No. 17/455,985.
Claims priority of application No. 32021032944.9 (HK), filed on Jun. 11, 2021.
Prior Publication US 2022/0397426 A1, Dec. 15, 2022
Int. Cl. A01D 34/416 (2006.01); G01D 5/14 (2006.01); G01R 33/00 (2006.01); G01R 33/07 (2006.01); G01R 33/09 (2006.01); H02P 6/08 (2016.01); H02P 6/30 (2016.01); B25F 5/00 (2006.01)
CPC G01D 5/145 (2013.01) [G01R 33/0076 (2013.01); G01R 33/072 (2013.01); G01R 33/091 (2013.01); H02P 6/08 (2013.01); H02P 6/30 (2016.02); B25F 5/001 (2013.01)] 24 Claims
OG exemplary drawing
 
1. A control assembly for use in controlling a speed or torque of operation of an electric device, the control assembly including:
a control assembly housing;
a magnetic sensor;
a magnetic element;
an actuator that is configured for movement relative to the control assembly housing wherein responsive to said movement of the actuator relative to the control assembly housing, the magnetic sensor and magnetic element are moved relative to each other between at least one of a first position and a second position such that the magnetic sensor senses a first magnetic field reading when in the first position and senses a second magnetic field reading when in the second position;
a control module operably connected to the magnetic sensor and configured for controlling the electric device to operate in at least one of a first speed or torque and a second speed or torque by reference to an output of the magnetic sensor indicative of the sensed first magnetic field reading and the second magnetic field reading respectively; and
a magnetic shielding element suitably shaped and positioned within the control assembly housing so as to alleviate a magnetic signal source external to the control assembly from interfering with the sensing by the magnetic sensor of the first and second magnetic field readings produced by the magnetic element in response to movement of the actuator.
 
13. A control assembly for use in selectably controlling forward and reverse operation of an electric device, the control assembly including:
a control assembly housing;
a magnetic sensor;
a magnetic element;
an actuator that is configured for movement relative to the control assembly housing wherein responsive to said movement of the actuator relative to the control assembly housing, the magnetic sensor and magnetic element are moved relative to each other between at least one of a first position and a second position such that the magnetic sensor senses a first magnetic field reading when in the first position and senses a second magnetic field reading when in the second position;
a control module operably connected to the magnetic sensor and configured for controlling the electric device to operate in at least one of a forward operational mode and a reverse operational mode by reference to an output of the magnetic sensor indicative of the sensed first magnetic field reading and the second magnetic field reading respectively; and
a magnetic shielding element suitably shaped and positioned within the control assembly housing so as to alleviate a magnetic signal source external to the control assembly from interfering with the sensing by the magnetic sensor of the first and second magnetic field readings produced by the magnetic element in response to movement of the actuator.