Abstract: A speaker includes a base having a groove, a tube received in the groove, a magnet disposed in the tube, a first ring-shaped body and a washer mounted, from top to bottom, on an outer side of the tube sequentially, and a second ring-shaped body connected to an edge of the first ring-shaped body and installed around a wall surface of a rim of the groove. The second ring-shaped body has an inner ring-shaped plate, an outer ring-shaped plate, and a connection segment connected between the inner ring-shaped plate and the outer ring-shaped plate. Therefore, a low-frequency effect thus generated is greatly improved.

Abstract: A speaker includes a base having a groove, a tube received in the groove, a magnet disposed in the tube, a first ring-shaped body and a washer mounted, from top to bottom, on an outer side of the tube sequentially, and a second ring-shaped body connected to an edge of the first ring-shaped body and installed around a wall surface of a rim of the groove. The second ring-shaped body has an inner ring-shaped plate, an outer ring-shaped plate, and a connection segment connected between the inner ring-shaped plate and the outer ring-shaped plate. Therefore, a low-frequency effect thus generated is greatly improved.

Abstract: An improved structure of a picture-frame type loudspeaker is disclosed. The loudspeaker structure having a magnetic core is mounted on a housing body adhered to the rear side of a picture frame, and the circumferential edge of the magnetic core is mounted with a conduit containing a voice coil, and the end section of the conduit, close to the magnetic core is connected together with a corrugation portion which is combined with the housing body, the middle section of the conduit is connected to a diaphragm and the other end of the conduit is connected to a vibration board within the picture frame via a medium. By means of the reaction to the signal current by the voice coil, a magnetic field is produced and a relative motion is formed with the magnetic core, such that the vibration board vibrates to produce sound from the picture frame.