A magnetic key includes a keycap, a base plate, a membrane circuit member, a frame, a first magnetic element, a second magnetic element, and a third magnetic element. The frame includes a first concave structure, a second concave structure and an opening. An accommodation space is defined by the frame and a first protrusion structure and a second protrusion structure of the base plate. The first magnetic element is received within the first concave structure. The second magnetic element is received within the second concave structure. The third magnetic element is disposed under the keycap and accommodated within the accommodation space. In response to a first magnetic force between the first and third magnetic elements and a second magnetic force between the second and third magnetic elements, the keycap is protruded out of the opening.

A direct current relay is disclosed comprising a pin member and a support member. The support member allows a housing for receiving a movable contactor and an upper yoke for attenuating electromagnetic repulsive power to be coupled to each other. The pin member passes through and is coupled to the support member and the movable contactor to prevent the movable contactor from being unintendedly separated. The support member passes through and is coupled to the housing and the upper yoke, and then extends toward the radial outside by receiving applied pressure which faces the radial outside. The pin member passes through and is coupled to the support member, and then extends toward the radial outside when the pressure is released. Therefore, a separate fastening member for coupling the pin member and the support member to the housing, the upper yoke, the movable contactor, and the like is not required.

A direct current relay is disclosed. A movable contact part provided on a direct current relay, according to an embodiment of the present disclosure, comprises a movable contact and a pin member that is through-coupled to the movable contact. The movable contact can be supported by the pin member and simultaneously move on a straight line along the pin member. Therefore, even when a physical force is applied to the movable contact, the movable contact does not arbitrarily separate therefrom. The pin member is coupled to a support member insertion-coupled to a housing and an upper yoke. The pin member is formed to have a diameter larger than that of a hollow formed in the support member. The pin member can be insertion-coupled to the support member. Therefore, arbitrary separation of the movable contact can be prevented even without a separate fastening member.

A relay for a high voltage circuit comprises a main coil and a first armature, wherein the first armature is located in the high voltage circuit and is correspondingly in a position to open and close the high voltage circuit in response to power down and power up of the main coil; a secondary coil that cooperates with the first armature and a driving circuit that supplies power to the secondary coil, wherein the driving circuit is powered by a high voltage supply of the high voltage circuit, the secondary coil is powered up to generate additional electromagnetic force that places the first armature in the closed position when the driving circuit is closed; and a second armature located in the driving circuit, and is correspondingly in a position to open or close the driving circuit in response to power down and power up of the main coil.

A switch includes a first fixed contact, a second fixed contact, a movable contact, a drive shaft, a first outside yoke, a second outside yoke, a first inside yoke, a second inside yoke, and a permanent magnet. The permanent magnet magnetically couples the first outside yoke, the second outside yoke, the first inside yoke, and the second inside yoke, and produces a magnetic field component in a direction in which the first fixed contact point and the second fixed contact point are aligned, between the first fixed contact point and the first movable contact point and between the second fixed contact point and the second movable contact point.

A switch includes a first fixed contact, a second fixed contact, a movable contact, a drive shaft, a first outside yoke, a second outside yoke, a first inside yoke, a second inside yoke, and a permanent magnet. The permanent magnet magnetically couples the first outside yoke, the second outside yoke, the first inside yoke, and the second inside yoke, and produces a magnetic field component in a direction in which the first fixed contact point and the second fixed contact point are aligned, between the first fixed contact point and the first movable contact point and between the second fixed contact point and the second movable contact point.

A bus bar of a contact device includes at least one electric path piece selected from a reverse and a forward electric path piece extending along a direction of current flowing through a moving contactor. The moving contactor is positioned between the reverse electric path piece and a fixed contact in moving directions of the moving contactor with the moving contactor positioned in the closed position. The reverse electric path piece allows current to flow therethrough in an opposite direction from current flowing through the moving contactor. The forward electric path piece is positioned on a same side as the fixed contact relative to the moving contactor in the moving directions of the moving contactor with the moving contactor positioned in the closed position. The forward electric path piece allows current to flow therethrough in a same direction as current flowing through the moving contactor.

A bus bar of a contact device includes at least one electric path piece selected from a reverse and a forward electric path piece extending along a direction of current flowing through a moving contactor. The moving contactor is positioned between the reverse electric path piece and a fixed contact in moving directions of the moving contactor with the moving contactor positioned in the closed position. The reverse electric path piece allows current to flow therethrough in an opposite direction from current flowing through the moving contactor. The forward electric path piece is positioned on a same side as the fixed contact relative to the moving contactor in the moving directions of the moving contactor with the moving contactor positioned in the closed position. The forward electric path piece allows current to flow therethrough in a same direction as current flowing through the moving contactor.

Disclosed are a direct current relay and a manufacturing method therefor. A movable contact part provided in a direct current relay comprises a movable contact and a lower yoke positioned below the movable contact configured to attenuate an electromagnetic repulsive force generated by contact between the movable contact and a fixed contact. The movable contact is provided with a coupling protrusion portion that protrudes downward. The lower yoke is provided with a movable contact coupling portion into which the coupling protrusion portion is inserted. The coupling protrusion portion can receive pressure directed radially outward after being inserted into the movable contact coupling portion. The coupling protrusion portion is expanded radially outward by the pressure. Accordingly, the outer circumferential surface of the coupling protrusion portion can be inserted into and coupled to the inner circumferential surface of the lower yoke that forms the movable contact coupling portion.

A high voltage relay resistant to instantaneous high-current impact is disclosed, and includes an electromagnet system, a control system, a contact system, and a base support. In the present solution, an electromagnetic force generated by the contact system is used to resolve a problem of contact separation caused by an electric repulsion force generated by an instantaneous high-current.