Patent ID: 8519573

Claim:
A reciprocating vibration generator comprising: a reciprocating vibrator comprising a ring-shaped permanent magnet having a center hole, wherein the ring-shaped permanent magnet has a first end face and a second end face, wherein a thickness direction is defined as a direction extending between the first end face and the second end face, wherein the ring-shaped permanent magnet is magnetized in said thickness direction; suspension spring means for supporting said reciprocating vibrator with respect to a fastening part in a manner able to be elastically displaced in the thickness direction; a first tube-shaped toroidal coil running through the center hole of the ring-shaped permanent magnet, the first tube-shaped toroidal coil having a first inside end, and a second tube-shaped toroidal coil running through the center hole of the ring-shaped permanent magnet, the second tube-shaped toroidal coil having a second inside end, wherein a magnetization direction of the first tube-shaped toroidal coil and the second tube-shaped toroidal coil substantially corresponds to the thickness direction, wherein the second tube-shaped toroidal coil is coaxial with the first tube-shaped toroidal coil such that the first inside end faces the second inside end, wherein the first inside end and the second inside end have the same magnetic pole.