A key switch device includes a pressing type switch, an operating key, and a light emitting unit. The operating key includes a key top and a key base. The key top is exposed from an operating panel and is pressed by a user. The key base is assembled with the key top. The key base is positioned between a substrate and the operating panel to turn on the switch. In a place corresponding to the light emitting unit between the key top and the key base, a hollow part is formed.

A switching device for an on-board electrical system of an electrically driven motor vehicle includes an electromechanical switch which is designed to connect and interrupt a supply line of the on-board electrical system. The electromechanical switch has: a stationary first switching contact, a movable second switching contact, and an actuation unit which has a mechanical force-transmitting element and a drive element. In order to switch from an open switching state to a closed switching state of the electromechanical switch, the drive element moves the transmitting element along a movement path, and the force-transmitting element moved along the movement path acts mechanically on the second switching contact and moves the second switching contact toward the first switching contact. In order to maintain the closed switching state of the electromechanical switch, the force-transmitting element applies, at the end of the movement path, a pressing force to the second switching contact for pressing against the first switching contact, without further driving by way of the drive element.

A switching device for an on-board electrical system of an electrically driven motor vehicle includes an electromechanical switch which is designed to connect and interrupt a supply line of the on-board electrical system. The electromechanical switch has: a stationary first switching contact, a movable second switching contact, and an actuation unit which has a mechanical force-transmitting element and a drive element. In order to switch from an open switching state to a closed switching state of the electromechanical switch, the drive element moves the transmitting element along a movement path, and the force-transmitting element moved along the movement path acts mechanically on the second switching contact and moves the second switching contact toward the first switching contact. In order to maintain the closed switching state of the electromechanical switch, the force-transmitting element applies, at the end of the movement path, a pressing force to the second switching contact for pressing against the first switching contact, without further driving by way of the drive element.

A switch contacts arrangement comprising a fixed assembly and a movable assembly couplable to said fixed assembly between a closed/open position. The fixed assembly comprises: a main contact group and a pre-arching contact element comprising a central contact pin centrally positioned in a contact seat and having a terminal portion protruding outside said contact seat. The movable assembly comprises a main contact element having a body with a contact end configured to be inserted into said contact seat with a movement, the external surface of said contact end in electrical contact with said main contact elements when inserted into said contact seat. The contact end comprises an opening and a longitudinal channel for housing the central contact pin and further comprises one or more transversal channel(s) conveying a quenching gas from the outside of the main contact element into said longitudinal channel during the opening operation of said movable assembly.

A switch contacts arrangement comprising a fixed assembly and a movable assembly couplable to said fixed assembly between a closed/open position. The fixed assembly comprises: a main contact group and a pre-arching contact element comprising a central contact pin centrally positioned in a contact seat and having a terminal portion protruding outside said contact seat. The movable assembly comprises a main contact element having a body with a contact end configured to be inserted into said contact seat with a movement, the external surface of said contact end in electrical contact with said main contact elements when inserted into said contact seat. The contact end comprises an opening and a longitudinal channel for housing the central contact pin and further comprises one or more transversal channel(s) conveying a quenching gas from the outside of the main contact element into said longitudinal channel during the opening operation of said movable assembly.

A switching device includes first and second fixed switching contacts and a movable switching contact. The first and second fixed switching contacts are connected to first and second device terminals and are arranged next to one another in such a way that their contact surfaces point in the same direction. The movable switching contact can be moved between a closed position and an open position. The first and second fixed switching contacts and the movable switching contact form an arrangement of electrical conductors which are arranged substantially parallel to one another. At least one of the fixed switching contacts has an elongated contact surface which extends in the direction of current flow. Electrodynamic forces act on the fixed conductors and the movable conductor, which are directed in such a way that the conductors attract each other, i.e., the switching contacts tend to close.

A switching device includes first and second fixed switching contacts and a movable switching contact. The first and second fixed switching contacts are connected to first and second device terminals and are arranged next to one another in such a way that their contact surfaces point in the same direction. The movable switching contact can be moved between a closed position and an open position. The first and second fixed switching contacts and the movable switching contact form an arrangement of electrical conductors which are arranged substantially parallel to one another. At least one of the fixed switching contacts has an elongated contact surface which extends in the direction of current flow. Electrodynamic forces act on the fixed conductors and the movable conductor, which are directed in such a way that the conductors attract each other, i.e., the switching contacts tend to close.

Various embodiments of the present technology generally relate to industrial circuit breakers. More specifically, a linear lever and tripping fork mechanism for thermal-magnetic circuit breakers is disclosed that provides information in the event of a trip about what caused the trip (i.e., overload or short circuit). In an embodiment, a circuit breaker includes a tripping fork that pivots in response to a thermal trip occurring in the device. In response to the tripping fork pivoting, a linear lever slides into a trip indication position. In response to the linear lever sliding into the trip indication position, trip indication componentry provides an indication that the thermal trip occurred to an output on the circuit breaker. The circuit breaker further includes a second tripping fork and linear lever that behave similarly in response to a magnetic trip occurring in the device.

Various embodiments of the present technology generally relate to industrial circuit breakers. More specifically, a linear lever and tripping fork mechanism for thermal-magnetic circuit breakers is disclosed that provides information in the event of a trip about what caused the trip (i.e., overload or short circuit). In an embodiment, a circuit breaker includes a tripping fork that pivots in response to a thermal trip occurring in the device. In response to the tripping fork pivoting, a linear lever slides into a trip indication position. In response to the linear lever sliding into the trip indication position, trip indication componentry provides an indication that the thermal trip occurred to an output on the circuit breaker. The circuit breaker further includes a second tripping fork and linear lever that behave similarly in response to a magnetic trip occurring in the device.

An indicating device for a dual power automatic transfer switch, which includes a first driving part connected to a first moving contact of a first power supply and a second driving part connected to a second moving contact of a second power supply; the indicating device includes a mechanical indicating device, an electrical indicating device and an indicating part acting on the mechanical indicating device and the electrical indicating device; the first and the second driving part respectively drive the indicating part to move; the electric indicating device at least includes a first and second switching device; the first switching device at least includes a first contact of the first switching device and a second contact of the first switching device which are connected in parallel; the second switching device at least includes a first contact and a second contact of the second switching device which are connected in parallel.