A vibration actuator includes: a fixing body having N-fold (N is a natural number) of 2 of core pole parts and a coil wound around each of the core pole parts; a movable body having a magnet part disposed being separated from each of the core pole parts in an axial direction of each of the core pole parts, for each of the core pole parts; and an elastic support part that movably supports the movable body, in which the magnet part has a magnetic pole disposed on each of the core pole part sides and facing each of the core pole parts, and in which the movable body vibrates in a direction orthogonal to both directions including a direction in which the N-fold of 2 of the core pole parts are aligned and the axial direction of the coil by the energization of the coil.

A vibration actuator includes: a fixing body having N-fold (N is a natural number) of 2 of core pole parts and a coil wound around each of the core pole parts; a movable body having a magnet part disposed being separated from each of the core pole parts in an axial direction of each of the core pole parts, for each of the core pole parts; and an elastic support part that movably supports the movable body, in which the magnet part has a magnetic pole disposed on each of the core pole part sides and facing each of the core pole parts, and in which the movable body vibrates in a direction orthogonal to both directions including a direction in which the N-fold of 2 of the core pole parts are aligned and the axial direction of the coil by the energization of the coil.

This patent document provides optical shutter devices based on electromagnetically activated shutters using a printed circuit board (“PCB”) structure to provide a coil that generates a magnetic field to move a permanent magnet in and out of an optical aperture integrated as part of the PCB structure to open and close the passage of light through the optical aperture.

A recharging system for recharging batteries or providing power to an implantable device includes an electric coil adapted to be coupled to the implantable device, the electric coil defining a coil interior and a coil exterior. A magnetic component is coupled to the electric coil and adapted to at least partially surround the implantable device. A mechanical actuator is attached to the magnetic component, the mechanical actuator converting compression motion into motion of the magnetic component relative to the electric coil.

An electromechanical generator for converting mechanical vibrational energy into electrical energy, the electromechanical generator comprising: a central mast, an electrically conductive coil assembly fixedly mounted to the mast, the coil assembly at least partly surrounding the mast, a mount for the coil assembly extending radially inwardly of the coil assembly and fixing the coil assembly to the mast, wherein the mount comprises a conical wall extending between the coil assembly and the mast, a magnetic core assembly movably mounted to the mast for linear vibrational motion along an axis about an equilibrium position on the axis, the magnetic core assembly at least partly surrounding the coil assembly and the mast, and a biasing device mounted between the mast and the magnetic core assembly to bias the magnetic core assembly in opposed directions along the axis towards the equilibrium position.

A novel method of triggering an electromagnetic type energy harvesting generator that has disposed a spherical magnet, surrounded by a coil of wire and rotatable in an enclosure about an axis with an axially protruding paddle member, axially aligned dual offset paddle members, or other flick trigger mechanism structure situated tangent along the surface of the spherical magnet enclosure, wherein this enclosed magnet is centred within the electrical coil, which is free to rotate about its axis. The magnet is held in a static state rotational position by two opposite outwardly disposed flux focus magnets. The spherical magnet and the focus magnets are all in a magnetic attractive circuit; and the magnetic flux lines are in a static field concentration throughout the coil windings aided by the focus magnets. A reciprocating trigger device means with a contact finger is utilized to engage the axially protruding paddle member(s).

A novel method of triggering an electromagnetic type energy harvesting generator that has disposed a spherical magnet, surrounded by a coil of wire and rotatable in an enclosure about an axis with an axially protruding paddle member, axially aligned dual offset paddle members, or other flick trigger mechanism structure situated tangent along the surface of the spherical magnet enclosure, wherein this enclosed magnet is centred within the electrical coil, which is free to rotate about its axis. The magnet is held in a static state rotational position by two opposite outwardly disposed flux focus magnets. The spherical magnet and the focus magnets are all in a magnetic attractive circuit; and the magnetic flux lines are in a static field concentration throughout the coil windings aided by the focus magnets. A reciprocating trigger device means with a contact finger is utilized to engage the axially protruding paddle member(s).

Electromechanical generator for converting mechanical vibrational energy into electrical energy, comprising: a central mast, an electrically conductive coil assembly mounted to the mast, mount for the coil assembly, a magnetic core assembly movably mounted to the mast for vibrational motion along an axis, a biasing device mounted between the mast and the core assembly and comprising a pair of first and second plate springs, each having an inner edge respectively fitted to first and second opposite ends of the mast and an outer edge fitted to the magnetic core assembly, each of the plate springs comprising a spring member comprising an inner portion, substantially orthogonal to the axis and including, the respective inner edge, and a cylindrical outer portion substantially parallel to the axis and including the respective outer edge, the spring member being a folded sheet spring and the inner and outer portions are connected by a fold.

An electromechanical generator for converting mechanical vibrational energy into electrical energy, the electromechanical generator comprising: a central mast, an electrically conductive coil assembly fixedly mounted to the mast, the coil assembly at least partly surrounding the mast, a mount for the coil assembly extending radially inwardly of the coil assembly and fixing the coil assembly to the mast, wherein the mount comprises a conical wall extending between the coil assembly and the mast, a magnetic core assembly movably mounted to the mast for linear vibrational motion along an axis about an equilibrium position on the axis, the magnetic core assembly at least partly surrounding the coil assembly and the mast, and a biasing device mounted between the mast and the magnetic core assembly to bias the magnetic core assembly in opposed directions along the axis towards the equilibrium position.

An electromechanical generator for converting mechanical vibrational energy into electrical energy, the electromechanical generator comprising: a central mast, an electrically conductive coil assembly fixedly mounted to the mast, a magnetic core assembly movably mounted to the mast for linear vibrational motion a biasing device mounted between the mast and the magnetic core assembly, the biasing device comprising a pair of first and second plate springs, and a resilient device mounted between the biasing device and the magnetic core assembly, the resilient device being configured to be deformed between the biasing device and the magnetic core assembly when the magnetic core assembly has moved, by the linear vibrational motion, away from an equilibrium position by a predetermined non-zero threshold amplitude, the resilient device comprising a pair of first and second flat spring elements, each having an outer edge fitted to the magnetic core assembly and a free inner edge.