In an electromagnetic relay, a connection terminal includes a first terminal section and a second terminal section. The first terminal section is accommodated in a base and is electrically connected to a coil. The second terminal section protrudes outside the base through a through hole and is electrically connected to an external connection body. The cover includes a second wall section provided to leave a space from a first wall section that has a through hole, and the second terminal section lies in the space. The space in which the second terminal section lies is sealed with a sealant.

In an electromagnetic relay, a connection terminal includes a first terminal section and a second terminal section. The first terminal section is accommodated in a base and is electrically connected to a coil. The second terminal section protrudes outside the base through a through hole and is electrically connected to an external connection body. The cover includes a second wall section provided to leave a space from a first wall section that has a through hole, and the second terminal section lies in the space. The space in which the second terminal section lies is sealed with a sealant.

A removable electric current switching element includes first and second housing parts fitted to the other and that can be moved between an assembled configuration and a partially disassembled configuration. The first housing part includes side walls provided with through inspection windows, the second housing part includes insulating walls which each delimit a volume in the second housing part around a corresponding mobile conductor. The first and second housing parts are arranged relative to one another in such a way that, in the assembled configuration the insulating walls mask the inspection windows and that, in the intermediate configuration the insulating walls are away from the inspection windows to free access to the inspection windows.

An arrangement for an electrical switching device is disclosed. The arrangement for an electrical switching device comprises a contact spring and a component attached to the contact spring. The component has an edge running in an inclined manner with respect to a longitudinal direction of the contact spring. The component also has at least two switching state positions and a transition phase between the switching state positions, and abuts the contact spring along the edge in the transition phase.

A framework part of a relay and a relay. An inner hollow portion and peripheral windows are formed by the framework. The windows are communicated with the exterior of the framework and the hollow portion. At least one group of contactors that can correspondingly contact are accommodated in the hollow portion. An arc gap is formed between the contactors that can correspondingly contact. The windows are aligned with the arc gap from an outer side. A main body of the framework is a hollowed injection molding framework, and has multiple windows that are aligned with the arc gap from the outer side, so that, under the precondition of ensuring the structural strength, materials can be reduced and the cost can be reduced. The windows can be used for installing functional components such as magnetic steel, a resistant act clip or an arcing and are extinguishing piece. The framework is made be applicable to relays and breakers having more functions and requirements, so as to improve a scope of application of products to a great extent and facilitate reduction of molds and other manufacturing costs.

A framework part of a relay and a relay. An inner hollow portion and peripheral windows are formed by the framework. The windows are communicated with the exterior of the framework and the hollow portion. At least one group of contactors that can correspondingly contact are accommodated in the hollow portion. An arc gap is formed between the contactors that can correspondingly contact. The windows are aligned with the arc gap from an outer side. A main body of the framework is a hollowed injection molding framework, and has multiple windows that are aligned with the arc gap from the outer side, so that, under the precondition of ensuring the structural strength, materials can be reduced and the cost can be reduced. The windows can be used for installing functional components such as magnetic steel, a resistant act clip or an arcing and are extinguishing piece. The framework is made be applicable to relays and breakers having more functions and requirements, so as to improve a scope of application of products to a great extent and facilitate reduction of molds and other manufacturing costs.

An electronic switch device with ceramic sheets includes a base having a base board, and an installation side and a connection side are respectively formed on the top and the underside thereof. A first board extends perpendicularly from the base board. Multiple terminals extend from the connection side of the base board. A device is installed to the installation side. A sheet made of isolating composite material is connected to a portion of the top of the base board and the first side of the first board. A cover is mounted to installation side of the base board and accommodate the device and the sheet. The sheet isolates a portion of the device that may generate sparks from the base board.

An electronic switch device with ceramic sheets includes a base having a base board, and an installation side and a connection side are respectively formed on the top and the underside thereof. A first board extends perpendicularly from the base board. Multiple terminals extend from the connection side of the base board. A device is installed to the installation side. A sheet made of isolating composite material is connected to a portion of the top of the base board and the first side of the first board. A cover is mounted to installation side of the base board and accommodate the device and the sheet. The sheet isolates a portion of the device that may generate sparks from the base board.

An electromagnetic contactor to open and close a contact formed by a movable contact and a fixed contact. The electromagnetic contactor includes an arc extinguishing cover having a shape in which a center portion is concaved with respect to an edge portion in a first direction and in which faces having a same height as the center portion continue in a second direction crossing the first direction; and an operation indicating piece arranged at an end of the movable contactor, to indicate a contact state of the contact by projecting from the center portion of the arc extinguishing cover or by being embedded therein. A step between the edge portion and the center portion of the arc extinguishing cover is equal to or larger than a projecting amount of the operation indicating piece that projects from the center portion of the arc extinguishing cover.

An electromagnetic device includes a spool having a cylindrical body with a through hole, a secondary coil formed in a spiral shape along an outer peripheral surface of the cylindrical body and formed with a closed circuit by metal plating, and a primary coil formed of a conductive wire wound around the secondary coil via an insulating material covering the secondary coil. An induced current, generated by applying a voltage to any one of the primary coil and the secondary coil, is allowed to flow to the other coil different from the one coil.