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US 9,761,385 B2Granted
Electric switch
AssigneeJohnson Electric S.A.
InventorsUdo Balgheim, Gerhard Fangmann
Life of this patent
Estimating the term…
Abstract
An electric switch, in particular for manually operated electric tools or appliances with an electric motor, is switchable from outside by means of a plunger. A changeover device is provided for setting the direction of rotation of the electric motor, which changeover device can be activated for example by a tappet arranged on the outside. The switch is constructed very compactly, which simplifies the sealing of a switch of this type.
Claims16
An electric switch for a manually operated electric device with an electric motor, comprising:
- a switch housing;
- a contact system having at least one contact arranged in the switch housing;
- a plunger which protrudes out of the switch housing, is connected to an activation element, and by means of its movement can switch at least one of the contacts of the contact system from an off position into an on position;
- and
- a circuit board fixed in the switch housing and has contact surfaces in the form of potentiometer circuits on one of its sides;
- wherein the plunger within the switch housing comprises a slider which has sliding contacts on the side of the slider facing the circuit board,
- wherein the rotational speed or the torque of the electric motor is adjustable through interaction of the sliding contacts with the contact surfaces of the circuit board,
- wherein the contact surfaces and the at least one contact of the contact system are arranged on the upper face of circuit board, wherein the slider is moveable along the orientation of the contact surfaces in a plane parallel to the circuit board and the working direction of the contacts of the contact system likewise lies in a plane parallel to the circuit board, and
- wherein a projection provided on the plunger prevents a switching of the contact system in the off position.
6 more elements
Dependencies are inferred from the claim text.