A power-assisted magnetic proximity switch comprises a shell; the inner chamber of the shell is provided with a magnet, a first terminal and a second terminal; the first terminal and the second terminal are disposed in parallel at intervals, and each terminal vertically penetrates into the lower end plate of the shell; the upper end of the second terminal is transversely provided with an elastic contact piece; the free end of the elastic contact piece is disposed above the first terminal; a power-assisted rod is disposed in the shell, and the outer end of the power-assisted rod is hinged with the shell; an elastic tongue piece is disposed on the elastic contact piece.

A control wheel includes a casing, a wheel ring, a first magnetic element, a pivotal shaft and a second magnetic element. The casing includes an accommodation structure and a concave structure. The accommodation structure includes a base. The wheel ring is disposed within the accommodation structure. The wheel ring is exposed outside through the accommodation structure and the concave structure. The pivotal shaft is disposed within the wheel ring and connected with the base of the accommodation structure. The wheel ring is rotatable relative to the pivotal shaft. The first magnetic element is disposed within the wheel ring. The second magnetic element is disposed within the base of the accommodation structure. The first magnetic element of the wheel ring and the second magnetic element are magnetically attracted by each other. Consequently, a rotating speed of the wheel ring is decreased.

An electronic device includes an enclosure and a keyboard positioned within the enclosure. The keyboard includes a substrate and a key mechanism. The key mechanism includes a keycap support mechanism, a keycap supported by the keycap support mechanism and movable relative to the substrate, a ferromagnetic component attached to the keycap support mechanism, and a selectively magnetizable magnet. The selectively magnetizable magnet system may include a magnetizable material and a coil configured to selectively magnetize and demagnetize the magnetizable material. The key mechanism may include a collapsible dome biasing the keycap toward the extended position.

A reed switch assembly includes a case having a receiving space formed therein, a substrate assembly seated on the case, and a cover for covering at least a portion of the substrate assembly, wherein the substrate assembly includes a printed circuit board, and a connector and a reed sensor that are electrically coupled to the printed circuit board.

A permanent magnet drive on-load tap-changing switch including a changing switch circuit that includes structurally identical odd- and even-numbered tap-changing circuits. The circuits include working contactors and dual-contact synchronous transition contactors made of primary and secondary contactors. The contactors each face directly a moving contactor, which are connected in parallel. A permanent magnet is fixed on each moving contactor and face directly on the other extremity thereof a moving contactor driving mechanism. The mechanism changes a force applied to the magnets, allowing the moving contactors to come into contact with or be separated from the working and transition contactors, thus implementing changeover from one tap to another tap. The switch is structurally simple and convenient to use, obviates the need for a high-speed mechanism, implements changing by the direct actions of the contactors, operates at high speed and reliably, and has a low failure rate and an extended service life.

The invention relates to a field device for automation engineering having a housing, wherein the housing has at least one associated pushbutton switch. Operation of the pushbutton switch is detected, according to the invention, inside the housing without the presence of mechanical or electrical passageway through the wall of the housing. For this, the housing does not need to have a blind hole or an inwardly directed depression. This is achieved by a rigid arrangement of a first element for producing a magnetic field on the outer wall of the housing. By means of interaction with a second element for influencing the magnetic field of the first element, which is arranged in an operating element, a variable magnetic field is produced inside the housing. This magnetic field is sensed by a sensor. On the basis of the alteration in the magnetic field, the sensor can determine whether the pushbutton switch is currently being operated.

A novel magnetic switch, comprising a housing, a terminal A and a terminal B, wherein an inner cavity of the housing is internally provided with a magnetic body and a tongue plate, one end of the tongue plate is movably connected to the upper end of the terminal B, the magnetic body, which is integrally linked to the tongue plate, is capable of being raised thereon; the other end of the tongue plate is disposed above the terminal A; the upper end of the terminal A is provided with an arc-removing apparatus, the arc-removing apparatus is provided with a stationary contact, and the other end of the tongue plate is provided with a movable contact. The magnetic switch has an effective structure, thus improving the work stability and prolonging the service life of the switch.

A permanent magnet drive on-load tap-changing switch including a changing switch circuit and a high-speed mechanism. The circuit includes structurally identical odd and even-numbered tap-changing switch circuits. The mechanism includes a traveling mechanism used for bearing a moving contactor, a moving magnet group connected with the traveling mechanism, and a fixed magnet group producing an attracting/repelling force with respect to the moving magnet group. The moving magnet group includes a first and second permanent magnet connected at homonymic magnetic poles. An exposed homonymic magnetic pole of the first and the second permanent magnet face directly the fixed magnet group. The fixed magnet group includes a rotating permanent magnet that rotates to change a force applied to the moving magnet group, allowing the moving contactors to either come into contact with or be separated from working contactors and dual-contact synchronous transition contactors.

Apparatus and methods for installing a MR-compatible magnet apparatus into a cochlear implant.

An actuation apparatus includes a module movably tethered to a base member. Each of the module and base member include a plurality of magnetic elements aligned in a plurality of paired magnet sets such that in a non-actuated condition a repulsive magnetic force generated by each paired magnet set causes separation of the module and base member. Application of an actuation force to an actuation surface of the module, in opposition to the magnetic repulsive force, causes movement of the module toward the base member such that contact is made between terminals defined by the magnetic elements of at least one of the paired magnet sets, to generate an output signal. In an illustrative example, the base member is a steering wheel armature of a vehicle and the module is a wheel hub assembly including an air bag and a hub cover defining the actuation surface.