公开(公告)号：US20210036637A1

公开(公告)日：2021-02-04

申请号：US17075640

申请日：2020-10-20

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

Inventor： Cheng Chen NIEH ,  Wai Man WONG ,  Ming Leong KONG ,  Pat On KWOK

IPC: H02P7/29 ,  H02P1/18 ,  H03K17/0412 ,  H03K17/687 ,  B25F5/00 ,  H01H13/12 ,  H02P6/08

Abstract: An electrical switch unit for use with a variable speed electrical device includes a housing for a pair of electrical switching contacts, and an actuator operably connected with one of those contacts. A signaling module is associated with the electrical switch unit, and has signaling circuitry for sensing the movement of the actuator and outputting a signaling module signal indicative of the sensed movement or position of the actuator. A power module with a power switching device controllably supplies power from the DC power source to the DC motor at a speed corresponding to the sensed movement or position of the actuator. A control module receives the signaling module signal, and outputs a control module signal to control the power module.

公开(公告)号：US20210012980A1

公开(公告)日：2021-01-14

申请号：US16923562

申请日：2020-07-08

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

Inventor： Cheng Chen NIEH ,  Kin Yu WONG ,  Lap Yi LAW

IPC: H01H9/20 ,  H01H21/22 ,  H01H21/36

Abstract: A trigger assembly for an electrical device that includes a main body having a housing within which an electrical switch unit is disposed. The trigger assembly may include a trigger member having an engagement portion that is hingedly connected to the main body so that the trigger member is rotatable about a hinge relative to the main body. The trigger assembly may include an actuator member operably-connected to the trigger member that is movable between an OFF position and an ON position. The trigger assembly may include a lock-off mechanism including a lock-off member that is selectively operable to restrict movement of the trigger member towards the main body and to thereby restrict movement of the actuator member from the OFF position into the ON position, and, to not restrict movement of the trigger member toward the main body.

公开(公告)号：US20250047223A1

公开(公告)日：2025-02-06

申请号：US18920223

申请日：2024-10-18

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

Inventor： Cheng Chen NIEH ,  Wai Man WONG ,  Ming Leong KONG ,  Pat On KWOK

IPC: H02P7/29 ,  B25F5/00 ,  H01H9/02 ,  H01H13/12 ,  H02P1/18 ,  H02P6/08 ,  H03K17/0412 ,  H03K17/687

Abstract: An electrical switch unit for use with a variable speed electrical device includes a housing for a pair of electrical switching contacts, and an actuator operably connected with one of those contacts. A signaling module is associated with the electrical switch unit, and has signaling circuitry for sensing the movement of the actuator and outputting a signaling module signal indicative of the sensed movement or position of the actuator. A power module with a power switching device controllably supplies power from the DC power source to the DC motor at a speed corresponding to the sensed movement or position of the actuator. A control module receives the signaling module signal, and outputs a control module signal to control the power module.

公开(公告)号：US20190302904A1

公开(公告)日：2019-10-03

申请号：US16366871

申请日：2019-03-27

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

Inventor： Cheng Chen NIEH ,  Kai Kei POON ,  Ka Leung LUK

IPC: G06F3/0362 ,  H01H19/14 ,  G06F3/044

Abstract: A control system for use in controlling operation of an electrical appliance, the system including: a processor module disposed inside of a housing of the electrical appliance, said processor module including at least one contactless-type sensor operably-connected with the processor module; an input control module including: an attachment element configured for releasably attaching the input control module to an outer surface of the housing; and at least one sensor-readable element configured for contactless-interaction with the contactless-type sensor; wherein said at least one sensor-readable element of the input control module is configured for movement into a plurality of different positions relative to the at least one contactless-type sensor of the processor module disposed inside the housing, whereby responsive to said movement of the at least one sensor-readable element into the plurality of different positions relative to the at least one contactless-type sensor, the contactless-type sensor is configured to sense a plurality of different readings from the sensor-readable element, and, said processor module is configured for controlling the electrical appliance to operate in a plurality of different operational modes by reference to the plurality of different readings sensed by the contactless-type sensor.

公开(公告)号：US20190089277A1

公开(公告)日：2019-03-21

申请号：US16101408

申请日：2018-08-11

Applicant: DEFOND ELECTECH CO., LTD. ,  Defond Components Limited

Inventor： Cheng Chen NIEH ,  Wai Man WONG ,  Ming Leong KONG ,  Pat On KWOK

IPC: H02P7/29 ,  H02P1/18 ,  H03K17/687 ,  H03K17/0412

Abstract: An electrical switch unit for use with an electrical device to control operation of a DC motor of the electrical device, the electrical switch unit comprising: a housing which houses a pair of electrical switching contacts, and, an actuator operably connected with at least one of the pair of electrical switching contacts, the actuator being configured for movement relative to the pair of electrical switching contacts so as to arrange the pair of electrical switching contacts into at least one of a closed configuration wherein power is able to be supplied from the DC power source to the DC motor via the pair of electrical switching contacts, and, an opened configuration wherein power is not able to be supplied from the DC power source to the DC motor via the pair of electrical switching contacts; a signaling module associated with the electrical switch unit comprising signaling circuitry for sensing the movement of the actuator and outputting a signaling module signal indicative of the sensed movement or position of the actuator; a power module comprising at least one power switching device for controllably supplying power from the DC power source to the DC motor; a control module comprising control circuitry for receiving the signaling module signal, and responsive to the received signaling module signal, outputting a control module signal to control the at least one power switching transistor device of the power module wherein the at least one power switching device controllably supplies power from the DC power source to the DC motor to allow operation of the DC motor at a speed corresponding to the sensed movement or position of the actuator; and wherein, the signaling module is integrally connected to a first end of the control module that is located within the electrical switch unit housing to allow relatively direct electrical communication between the pair of electrical switching contacts and the control module, and, whereby the control module is configured to extend outwardly of the electrical switch housing so as to terminate at a distal second end.

公开(公告)号：US20210183589A1

公开(公告)日：2021-06-17

申请号：US17185962

申请日：2021-02-26

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

Inventor： Wai Man WONG ,  Ming Leong KONG ,  Cheng Chen NIEH

IPC: H01H9/04 ,  H01H9/02 ,  H01H11/00 ,  H01H13/06

Abstract: An electrical switch unit for use in controlling operation of an electrical device, the electrical switch unit including: an electrical switch unit housing for housing at least a pair of electrical switching contacts of the electrical switch unit, said electrical switch unit housing including a first housing member and a second housing member that are configured for attachment together at peripheral regions of the first and second housing members so as to cooperatively form an enclosed space for housing the pair of electrical switching contacts therein; an actuator member operably-connected with at least one of the pair of electrical switching contacts, the actuator being configured for movement relative inwardly and outwardly of an opening in the electrical switch unit housing so as to arrange the pair of electrical switching contacts into at least one of a closed configuration wherein power is able to be supplied from a power source to motor or other electrically-operable element of the electrical device via the pair of electrical switching contacts, and, an opened configuration wherein power is not able to be supplied from the power source to the motor or other electrically-operable element of the electrical device via the pair of electrical switching contacts; and an sealing element including an elastically-resilient polymeric material, said sealing element being configured for location between the first and second housing members and extending about the peripheral regions of the attached first and second housing members so as to occlude passage and ingress of particulates and water into the electrical switch unit housing.

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：US20200272247A1

公开(公告)日：2020-08-27

申请号：US16786423

申请日：2020-02-10

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

Inventor： Cheng Chen NIEH ,  Chi Ming LAI

IPC: G06F3/0362 ,  G06F3/14 ,  G06F3/041 ,  G06F3/0488 ,  G06F3/01 ,  G06F3/0484

Abstract: A control knob for controlling operation of a machine, the control knob including: an attachment surface configured for attaching the control knob to a surface of the machine; a display member comprising an electronic display module disposed thereon; a motion sensor configured for sensing motion of the user's hand, said sensor being operably-connected to the display member such that, responsive to the motion sensor sensing motion of the user's hand, the display member is configured to switch operation from a sleep mode into an active mode; an operational mode display controller for controlling display of operational modes of the machine upon the electronic display module, said operational mode display controller being configured for rotational movement around the electronic display module amongst a plurality of rotational positions, said operational mode display controller being operably connected with the electronic display module such that, responsive to the rotational movement of the operational mode display controller amongst the plurality of rotational positions, the electronic display module is configured to display a plurality of operational modes of the machine corresponding to the plurality of rotational positions; and an operational mode selector for controlling selection of one of the plurality of operational modes of the machine when said one of the plurality of operational modes is displayed on the electronic display module, the operational mode selector being configured for depressible movement to actuate selection of the operational mode displayed on the electronic display module.

公开(公告)号：US20190157019A1

公开(公告)日：2019-05-23

申请号：US16181220

申请日：2018-11-05

Applicant: DEFOND ELECTECH CO., LTD. ,  Defond Components Limited

Inventor： Wai Man WONG ,  Ming Leong KONG ,  Cheng Chen NIEH

IPC: H01H9/04 ,  H01H9/02 ,  H01H11/00

Abstract: An electrical switch unit for use in controlling operation of an electrical device, the electrical switch unit including: an electrical switch unit housing for housing at least a pair of electrical switching contacts of the electrical switch unit, said electrical switch unit housing including a first housing member and a second housing member that are configured for attachment together at peripheral regions of the first and second housing members so as to cooperatively form an enclosed space for housing the pair of electrical switching contacts therein; an actuator member operably-connected with at least one of the pair of electrical switching contacts, the actuator being configured for movement relative inwardly and outwardly of an opening in the electrical switch unit housing so as to arrange the pair of electrical switching contacts into at least one of a closed configuration wherein power is able to be supplied from a power source to motor or other electrically-operable element of the electrical device via the pair of electrical switching contacts, and, an opened configuration wherein power is not able to be supplied from the power source to the motor or other electrically-operable element of the electrical device via the pair of electrical switching contacts; and an sealing element including an elastically-resilient polymeric material, said sealing element being configured for location between the first and second housing members and extending about the peripheral regions of the attached first and second housing members so as to occlude passage and ingress of particulates and water into the electrical switch unit housing.

公开(公告)号：US20240372443A1

公开(公告)日：2024-11-07

申请号：US18773106

申请日：2024-07-15

Applicant: DEFOND ELECTECH CO., LTD

Inventor： Kai Kei Poon ,  Siu Hung Lee ,  Ho Kan Low ,  Ka Leung Chan ,  Cheng Chen NIEH

IPC: H02K11/21 ,  G01D5/347 ,  H02P6/04

Abstract: The present invention provides a motor encoder with a programmable and tactile feedback and an operation method thereof. The encoder includes: a rotary knob; a motor for providing virtual stopping, virtual termination and virtual elastic loading when the knob is turned, and generating a tactile feedback and resistance in different events; a position sensor for providing position information when the knob is started and in a movement process; a controller with a motor driver, wherein the controller is electrically connected with the motor and the position sensor respectively and used for obtaining a position feedback from the position sensor and driving the motor to form closed-loop torque feedback control; and an input interface electrically connected with the controller and used for inputting instruction information to the controller.