Energy converter (113; 213) - having at least one arrangement (16.1) for converting mechanical energy into electrical energy, which has an electrical coil, a first permanent magnet which is held in a fixed manner in relation to the coil and a second permanent magnet which is movable relative to the coil, wherein a change in the magnetic flux caused by movement of the second permanent magnet induces an electrical current in the coil and wherein the first permanent magnet holds the second permanent magnet in an idle position by magnetic holding forces, and - having an actuation element (114; 214) which is functionally connected to the second permanent magnet, - wherein the two permanent magnets (18, 19) have mutually opposite holding surfaces (21a, 21b, 22a, 22b) which extend in the direction of the trajectory of the movable second permanent magnet and between which the magnetic holding forces act, characterized by - a housing having a first inlay (27.1) which is provided with dividing walls and which forms two annular chambers (28, 29) arranged in layers one above the other and a first section of a central receiving chamber (130; 230) arranged concentrically to the annular chambers (28, 29), - wherein the fixed first permanent magnet is arranged in the upper of the two annular chambers, the electric coil is arranged in the annular chamber lying below this and the movable second permanent magnet functionally connected to the actuation element (114; 214) is arranged in the central receiving chamber (130; 230), and - wherein the second permanent magnet can be moved through the winding of the coil on actuation of the actuation element. - having at least one arrangement (16.1) for converting mechanical energy into electrical energy, which has an electrical coil, a first permanent magnet which is held in a fixed manner in relation to the coil and a second permanent magnet which is movable relative to the coil, wherein a change in the magnetic flux caused by movement of the second permanent magnet induces an electrical current in the coil and wherein the first permanent magnet holds the second permanent magnet in an idle position by magnetic holding forces, and - having an actuation element (114; 214) which is functionally connected to the second permanent magnet, - wherein the two permanent magnets (18, 19) have mutually opposite holding surfaces (21a, 21b, 22a, 22b) which extend in the direction of the trajectory of the movable second permanent magnet and between which the magnetic holding forces act, - a housing having a first inlay (27.1) which is provided with dividing walls and which forms two annular chambers (28, 29) arranged in layers one above the other and a first section of a central receiving chamber (130; 230) arranged concentrically to the annular chambers (28, 29), - wherein the fixed first permanent magnet is arranged in the upper of the two annular chambers, the electric coil is arranged in the annular chamber lying below this and the movable second permanent magnet functionally connected to the actuation element (114; 214) is arranged in the central receiving chamber (130; 230), and - wherein the second permanent magnet can be moved through the winding of the coil on actuation of the actuation element.