An electronic module is provided including a circuit board defining a longitudinal axis and having a first surface and a second surface. A module housing is provided having a bottom surface and side walls extending from the bottom surface to form an open face through which the circuit board is received. Power switches configured as an inverter circuit to drive an electric motor are mounted on the second surface of the circuit board facing the bottom surface of the module housing, and a series of heat sinks are discretely mounted on the first surface of the circuit board facing the open face opposite the power switches. Potting material is disposed in the distance between the circuit board and the bottom surface of the module housing to cover the power switches. Thermal vias are disposed through the circuit board between corresponding ones of the heat sinks and the power switches.

An electronic module is provided including power switches mounted on a circuit board and configured as an inverter circuit for an electric motor. A sliding member is coupled to an actuator. A power contact switch is provided including a first conductive body, a second conductive body, and a contact switch. The first and second conductive bodies are mounted on a first surface of the circuit board and include pins received through through-holes of the circuit board to make electrical contact with two conductive tracks on a second surface of the circuit board. The contact switch pivotably is secured to the first conductive body and pivotably moveable by the sliding member to make contact with the second conductive body with movement of the actuator. A flyback diode is electrically connected between the first and second conductive track on the second surface of the circuit board parallel to the power contact switch.

A trigger switch includes a housing including a casing; a trigger coupled to the housing to be capable of approaching and separating from the housing; a contact mechanism; a first terminal extending from outside of the housing to the casing; and a second terminal extending from outside of the housing to the casing and including a plate surface facing a plate surface of the first terminal. A first wire connection portion capable of connecting a conductor portion of a first wire is provided to an end of the first terminal located outside of the housing in an extending direction of the first terminal, and a second wire connection portion capable of connecting a conductor portion of a second wire is provided to an end of the second terminal located outside of the housing in an extending direction of the second terminal.

A powered surgical tool with a switch for regulating tool operation. A pair of opposed arms extend outwardly from opposed sides of the switch. The arms move between safety and run states. When the arms are in the safety state, the arms engage a static surface to prevent movement of the switch. When in the arms are in the run state the arms are spaced from the static surface so movement is allowed. The arms are connected together so that the movement of one arm results in simultaneous movement of the other arm.

Systems and methods for controlling a power trowel. A power trowel includes a handle including a speed control input, a housing, a shaft connecting the handle and the housing, a safety mechanism located on the shaft, a blade assembly positioned below the housing, a motor located within the motor housing and coupled to the blade assembly, and a controller. The safety mechanism includes a safety lever configured to move in response to an uncontrolled condition of the power trowel. The controller is connected to the motor and the safety mechanism. The controller is configured to drive, in response to actuation of the speed control input, the motor, detect a movement of the safety lever from a first position to a second position, and perform, in response to the movement of the safety lever to the second position, a safety operation.

The invention discloses a battery assembly and an electronic cigarette using the battery assembly, wherein the battery assembly comprises a main body, a circuit board mounted in the main body and a button assembly, the main body is provided with an avoidance hole and at least one stopper, the button assembly comprises a button cap and a button contact, the button contact is fixedly mounted in the main body and is electrically connected with the circuit board, and the button cap is slidably mounted in the avoidance hole. When the button cap slides to squeeze the button contact, the button cap abuts against the stopper to form a trigger position where the button cap triggers the button contact to transmit a control signal to the circuit board.

An electronic module is provided including a circuit board defining a longitudinal axis and having a first surface and a second surface. A module housing is provided having a bottom surface and side walls extending from the bottom surface to form an open face through which the circuit board is received. Power switches configured as an inverter circuit to drive an electric motor are mounted on the second surface of the circuit board facing the bottom surface of the module housing, and a series of heat sinks are discretely mounted on the first surface of the circuit board facing the open face opposite the power switches. Potting material is disposed in the distance between the circuit board and the bottom surface of the module housing to cover the power switches. Thermal vias are disposed through the circuit board between corresponding ones of the heat sinks and the power switches.

A battery-powered handheld machine tool, particularly a circular saw, includes an electric motor for rotationally driving a tool that is arranged on the handheld machine tool, a front and a rear handle each in terms of an advancing direction of the handheld machine tool, and a receiving recess for receiving a replaceable battery. The rear handle is mounted such that it can pivot out laterally about a pivot axis so that when the rear handle is in a state of being pivoted out, the receiving recess is exposed for receiving or removing the replaceable battery, and so that when the rear handle is in a state of being pivoted in, the reception or removal of the replaceable battery into or out of the receiving recess is blocked.

A method is provided for identifying a battery pack that is operably coupled to a battery charger. The method comprises: measuring voltage at a plurality of designated terminals of a first battery pack while the battery pack is coupled to the battery charger; determining how many of the designated terminals are connected to a reference voltage, such as battery positive; and identifying an attribute of the battery pack based on how many of the designated terminals are connected to the reference voltage.

Adapters for a power tool are backwards compatible with a variety of different power tools, battery packs, and other power tool devices. The power tool pack adapter fits between a power tool and a battery pack (or other such power tool devices) and provides extra functionality (e.g., voice control, cameras, machine learning, etc.) to a power tool or other power tool device. The added functionality can be implemented by a dedicated electronic controller and/or processor in the power tool pack adapter.