Patent ID: 6516071
Filing Date: 2003-02-04
Classification: H04R

Abstract:
A structure of a picture-frame type loudspeaker having a magnetic core mounted on a housing body adhered to the rear side of a picture frame, the circumferential edge of the magnetic core being mounted with a conduit containing a voice coil therein, the end section of the conduit close to the magnetic core being connected together with a first corrugation portion extended outward to the housing body, characterized in that the circumferential edge of the conduit between the first corrugation portion and a vibration board is provided with a diaphragm mounted with the housing body, and the other end of the conduit is connected with the vibration board provided within the picture frame, wherein a second corrugation portion having a wave-shaped sectional area is provided between the circumferential edge of the diaphragm and the housing body.