公开(公告)号：US20220397426A1

公开(公告)日：2022-12-15

申请号：US17455985

申请日：2021-11-22

Applicant: Defond Electech Co., Ltd. ,  Defond Components Limited

Inventor： Cheng Chen NIEH ,  Chiu Keung LOONG ,  Wai Man WONG

IPC: G01D5/14 ,  G01R33/07 ,  G01R33/00 ,  G01R33/09

Abstract: A control assembly for controlling a speed or torque of operation of an electric device includes a control assembly housing, a magnetic sensor, a magnetic element; and an actuator. The actuator moves relative to the control assembly and, responsive to that movement, the magnetic sensor and magnetic element are moved relative to each other between a first position and a second position so 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 is operably connected to the magnetic sensor and configured for controlling the electric device, and a magnetic shielding element is positioned within the control assembly housing to alleviate a magnetic signal source external to the control assembly from interfering with the sensing by the magnetic sensor.

公开(公告)号：US20190172670A1

公开(公告)日：2019-06-06

申请号：US16207397

申请日：2018-12-03

Applicant: Defond Electech Co., Ltd. ,  Defond Components Limited

Inventor： Chiu Keung LOONG

IPC: H01H47/00 ,  H01H47/22 ,  G01R31/02

Abstract: A detection circuit module for use with a household appliance door to detect when the door is closed and/or locked, said detection circuit module having a first and a second contact configured for electrical connection with the household appliance door so as to be operable with the household appliance door, the detection circuit module including: a door closing switch arranged electrically in series between the first connecting contact and an actuator; a door locking switch arranged electrically in series between the actuator member and the second connecting contact; and a diode arranged in series with the actuator and the second connecting contact and said diode being arranged electrically in parallel with the door locking switch.