Control assembly for use in operation of an electric device

Patent metadata

Field	Value
Publication number	US-2019143501-A1
Application number	US-201816180922-A
Country	US
Kind code	A1
Filing date	Nov 5, 2018
Priority date	Nov 15, 2017
Publication date	May 16, 2019
Grant date	—

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.

First claim

What is claimed is:

1 . 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 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; 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.

2 . A control assembly as claimed in claim 1 wherein the magnetic sensor includes a hall effect sensor.

3 . A control assembly as claimed in claim 1 herein the magnetic sensor is mounted to the control assembly housing and the magnetic element is mounted to the actuator.

4 . A control assembly as claimed in claim 1 wherein the magnetic sensor is mounted to the actuator and the magnetic element is mounted to the control assembly housing.

5 . A control assembly as claimed in claim 1 wherein the control assembly is integrally formed in an electric switch unit whereby the actuator comprises an actuator of the electric switch for closing and opening contacts of the electric switch unit.

6 . A control assembly as claimed in claim 1 wherein the output of the magnetic sensor includes a variable resistance that is indicative of at least one of the sensed first magnetic field reading and the second magnetic field reading.

7 . A control assembly as claimed in claim 1 wherein the magnetic sensor includes a magnetoresistive material.

8 . A control assembly as claimed in claim 1 wherein the speed of operation of the electric device include a speed of operation of an electric motor of the electric device.

9 . 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; 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 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.

10 . A control assembly as claimed in claim 9 wherein the magnetic sensor includes a hall effect sensor.

11 . A control assembly as claimed in claim 9 wherein the magnetic sensor is mounted to the control assembly housing and the magnetic element is mounted to the actuator.

12 . A control assembly as claimed in claim 9 wherein the magnetic sensor is mounted to the actuator and the magnetic element is mounted to the control assembly housing.

13 . A control assembly as claimed in claim 9 wherein the control assembly is integrally formed in an electric switch unit whereby the actuator comprises a reversing lever of the electric switch unit.

14 . A control assembly as claimed in claims 9 wherein the output of the magnetic sensor includes a variable resistance that is indicative of at least one of the sensed first magnetic field reading and the second magnetic field reading.

15 . A control assembly as claimed in claim 9 wherein the magnetic sensor includes a magnetoresistive material.

16 . A control assembly as claimed in claim 9 wherein the forward and reverse operation of the electric device includes a forward and reverse operation of an electric motor of the electric device.

17 . A control assembly for use in selectably controlling forward and reverse operation of an electric device, the control assembly including:
a control assembly housing; an optical sensor; 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 optical sensor senses a first optical reading when the actuator is arranged in a first position relative to the control assembly hosing, and, senses a second optical reading when the actuator is arranged in a second position relative to the control assembly housing; and a control module operably connected to the optical 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 optical sensor indicative of the sensed first optical reading and the second optical reading field reading respectively.

18 . A control assembly as claimed in claim 17 wherein the optical sensor includes a photo interrupter.

19 . A control assembly as claimed in claim 17 wherein the optical sensor is mounted to the control assembly housing whereby the actuator is configured to move relative to the optical sensor.

20 . A control assembly as claimed in claim 17 wherein the optical sensor is mounted to the actuator whereby the optical sensor is configured to move relative to the control assembly housing when the actuator is moved relative the control assembly housing.

21 . A control assembly as claimed in claim 17 wherein the control assembly is integrally formed in an electric switch unit whereby the actuator comprises a reversing lever of the electric switch unit.

22 . A control assembly as claimed in claim 17 wherein the output of the optical sensor includes a variable resistance that is indicative of at least one of the sensed first optical reading and the second optical reading.

23 . A control assembly as claimed in claims 17 wherein the forward and reverse operation of the electric device includes a forward and reverse operation of an electric motor of the electric device.

Assignees

• Defond Electech Co Ltd
• Defond Components Ltd

Inventors

• Wong Wai Man
• Loong Chiu Keung

Classifications

• B25F5/001 Primary

  Gearings, speed selectors, clutches or the like specially adapted for rotary tools · CPC title

• H02P6/30

  Arrangements for controlling the direction of rotation (H02P6/22 takes precedence) · CPC title

• H02P6/08

  Arrangements for controlling the speed or torque of a single motor (H02P6/10, H02P6/28 take precedence) · CPC title