Patent ID: 9584923
Date: 2017-02-28
CPC Classifications: H04R

Claim:
1. A round window driving vibrator comprising: a permanent magnet having three poles of SNS or NSN; a case opened at an upper side thereof to receive the permanent magnet; a coil member wound around an outer periphery of the permanent magnet, the coil member comprising a first coil wound around a middle section of the permanent magnet and second and third coils wound around upper and lower sections of the permanent magnet, respectively, the first, second and third coils being arranged such that a direction of electric current flowing through the second coil is the same as that of the electric current flowing through the third coils and a direction of the electric current flowing through the first coil is opposite the direction of the electric current flowing through the second and third coils; a vibration plate connected to one end of the permanent magnet; and a support plate disposed on a bottom surface of the case and connected to the other end of the permanent magnet, wherein the vibration plate is disposed to protrude from the case, and the vibration plate is spaced apart from the case, the round window driving vibrator further comprises a vibration transfer member disposed between the vibration plate and the permanent magnet, the vibration transfer member is connected at one end to the vibration plate and is connected at the other end to the permanent magnet such that the one end connected to the vibration plate protrudes out of the case, the support plate comprises a unitary body formed by cutting away sections of the body, wherein the body includes a circular rim, a circular central hub, and two rounded spokes located on opposing sides of the central hub, the rounded spokes each including a linear section and an arcuate section, wherein a first end of the linear section of each spoke is connected to opposing sides of the central hub and the arcuate section extends from a second end of the linear section to an edge of the circular rim, the support plate further comprises a vibration control pin disposed at a center of the central hub to control vibration caused by driving of the permanent magnet, and the round window driving vibrator is adapted to be provided at an inlet of a round window in a cochlea.