公开(公告)号：US11694862B2

公开(公告)日：2023-07-04

申请号：US17095462

申请日：2020-11-11

Applicant: DEFOND ELECTECH CO., LTD ,  DEFOND COMPONENTS LIMITED

Inventor： Wai Man Wong

IPC: H01H13/14 ,  H01H13/04 ,  B25F5/02 ,  H01H13/52

CPC classification number: H01H13/14 ,  B25F5/02 ,  H01H13/04 ,  H01H13/52 ,  H01H2221/052

Abstract: A trigger switch assembly for use with an electrical device, including: a switch housing; a switch circuit disposed within the switch housing; an actuator rod configured for operable-interaction with a contact lever of the switch circuit; a trigger member having an actuator rod engagement recess configured for receiving a first end of the actuator rod therein, and, a finger-engagement portion configured for engagement by a user's finger so as to urge the actuator rod along the movement axis from the OFF position in to its ON position; and a lock-off mechanism.

公开(公告)号：US11919137B2

公开(公告)日：2024-03-05

申请号：US18119054

申请日：2023-03-08

Applicant: DEFOND ELECTECH CO., LTD ,  DEFOND COMPONENTS LIMITED

Inventor： Wai Man Wong ,  Chiu Keung Loong

IPC: H02P6/30 ,  B25F5/00 ,  H02P6/08

CPC classification number: B25F5/001 ,  H02P6/08 ,  H02P6/30

Abstract: A control assembly for use in controlling a speed 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 move 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; and, 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 and a second speed by reference to an output of the magnetic sensor indicative of the sensed first magnetic field reading and the second magnetic field reading respectively.

公开(公告)号：US11623335B2

公开(公告)日：2023-04-11

申请号：US16180922

申请日：2018-11-05

Applicant: DEFOND ELECTECH CO., LTD ,  DEFOND COMPONENTS LIMITED

Inventor： Wai Man Wong ,  Chiu Keung Loong

IPC: H02P6/30 ,  H02P6/08 ,  H02P6/22 ,  B25F5/00

Abstract: A control assembly for use in controlling a speed 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 move 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; and, 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 and a second speed by reference to an output of the magnetic sensor indicative of the sensed first magnetic field reading and the second magnetic field reading respectively.

公开(公告)号：US20210142966A1

公开(公告)日：2021-05-13

申请号：US17095462

申请日：2020-11-11

Applicant: DEFOND ELECTECH CO., LTD ,  DEFOND COMPONENTS LIMITED

Inventor： Wai Man Wong

IPC: H01H13/14 ,  H01H13/04 ,  B25F5/02

Abstract: A trigger switch assembly for use with an electrical device, including: a switch housing; a switch circuit disposed within the switch housing; an actuator rod configured for operable-interaction with a contact lever of the switch circuit; a trigger member having an actuator rod engagement recess configured for receiving a first end of the actuator rod therein, and, a finger-engagement portion configured for engagement by a user's finger so as to urge the actuator rod along the movement axis from the OFF position in to its ON position; and a lock-off mechanism.

公开(公告)号：US11913812B2

公开(公告)日：2024-02-27

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: A01D34/416 ,  G01D5/14 ,  G01R33/00 ,  G01R33/07 ,  G01R33/09 ,  H02P6/08 ,  H02P6/30 ,  B25F5/00

CPC classification number: G01D5/145 ,  G01R33/0076 ,  G01R33/072 ,  G01R33/091 ,  H02P6/08 ,  H02P6/30 ,  B25F5/001

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：US20230219207A1

公开(公告)日：2023-07-13

申请号：US18119054

申请日：2023-03-08

Applicant: DEFOND ELECTECH CO., LTD ,  DEFOND COMPONENTS LIMITED

Inventor： Wai Man Wong ,  Chiu Keung Loong

IPC: B25F5/00 ,  H02P6/30 ,  H02P6/08

CPC classification number: B25F5/001 ,  H02P6/08 ,  H02P6/30

Abstract: A control assembly for use in controlling a speed 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 move 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; and, 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 and a second speed by reference to an output of the magnetic sensor indicative of the sensed first magnetic field reading and the second magnetic field reading respectively.

公开(公告)号：US11664710B2

公开(公告)日：2023-05-30

申请号：US17070767

申请日：2020-10-14

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

Inventor： Wai Man Wong

IPC: H02K11/33 ,  H02K7/14 ,  H02K5/04

CPC classification number: H02K11/33 ,  H02K5/04 ,  H02K7/14 ,  H02K7/145

Abstract: A variable-speed control assembly for use in controlling speed of an electric motor of an electric device, the variable-speed control assembly including: a housing; a speed signaling circuit module located within the housing including a pair of spaced-apart electrically-conductive stationary contact members and a movable electrically-conductive contact member configured for movement relative to the pair of stationary contact members between at least one of an OFF position in which the movable contact member does not electrically connect the pair of stationary contact members, and, a plurality of ON positions in which the movable contact member electrically connects the pair of stationary contact members such that an electric current supplied to the speed signaling circuit module from a power supply of the electric device is able to flow between the pair of stationary contact members via the movable contact member; wherein the movable contact member includes an elastically-deformable material configured for deforming in to a plurality of different deformed configurations when arranged in each of the plurality of ON positions such that a contact area between the movable contact member and the pair of stationary contact members will vary in each of the plurality of ON positions resulting in an amount of electrical resistance across the movable contact member varying when arranged in each of the plurality of ON positions relative to the pair of stationary contact members; and whereby said speed signaling circuit module is configured for producing different output electrical signals configured for use in controlling speed of operation of the electric motor by reference to the variable electrical resistance across the movable contact member when arranged in each of the ON positions.

公开(公告)号：US20210016427A1

公开(公告)日：2021-01-21

申请号：US16932564

申请日：2020-07-17

Applicant: DEFOND ELECTECH CO., LTD ,  DEFOND COMPONENTS LIMITED

Inventor： Wai Man Wong

IPC: B25D16/00 ,  B25F5/00 ,  H01H9/06 ,  B23B45/02

Abstract: A control assembly for use with an electrical device to control operation of the electrical device in a plurality of operational modes.

公开(公告)号：US11975434B2

公开(公告)日：2024-05-07

申请号：US16932564

申请日：2020-07-17

Applicant: DEFOND ELECTECH CO., LTD ,  DEFOND COMPONENTS LIMITED

Inventor： Wai Man Wong

IPC: B25D16/00 ,  B23B45/02 ,  B25F5/00 ,  H01H3/20 ,  H01H9/06

CPC classification number: B25D16/006 ,  B23B45/02 ,  B25F5/001 ,  H01H9/06 ,  B25D2216/0084 ,  B25D2250/255 ,  H01H3/20

Abstract: A control assembly for use with an electrical device to control operation of the electrical device in a plurality of operational modes.

公开(公告)号：US20190143501A1

公开(公告)日：2019-05-16

申请号：US16180922

申请日：2018-11-05

Applicant: DEFOND ELECTECH CO., LTD ,  DEFOND COMPONENTS LIMITED

Inventor： Wai Man Wong ,  Chiu Keung Loong

IPC: B25F5/00 ,  H02P6/08 ,  H02P6/30

Abstract: A control assembly for use in controlling a speed 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 move 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; and, 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 and a second speed by reference to an output of the magnetic sensor indicative of the sensed first magnetic field reading and the second magnetic field reading respectively.