Patent ID: 7570774
Filing Date: 2009-08-04
Classification: H04R

Abstract:
1. A speaker having an improved sound-radiating function to both directions, having a magnetic circuit unit and a voice coil for vibrating toward a backward direction and a forward direction due to interaction with the magnetic circuit unit, the speaker comprising: a cone-shaped auxiliary vibrating plate having a damping function and a cone-shaped primary vibrating plate sequentially installed onto a bobbin from the forward direction, central necks of the auxiliary vibrating plate and the primary vibrating plate being fixed to said bobbin, respectively, the auxiliary vibrating plate being enlarged toward the forward direction, and the primary vibrating plate being enlarged toward the backward direction, wherein said cone-shaped auxiliary vibrating plate is sized smaller than said cone-shaped primary vibrating plate, and wherein said primary vibrating plate radiates sound in a first direction and said auxiliary vibrating plate radiates sound in a second direction.