COMPONENT FOR LOUDSPEAKER, ITS MANUFACTURING METHOD, AND LOUDSPEAKER SYSTEM USING THE COMPONENT

摘要

PROBLEM TO BE SOLVED: To solve the deterioration of acoustic characteristics caused by the hygroscopic property of a flame-retardant component (such as a diaphragm) for a loudspeaker, the occurrence of the strength deterioration, low elasticity and internal loss of the component (such as the diaphragm) for the loudspeaker by a flame retarder and the rise of a manufacturing cost by the increase of the number of processing procedures, etc. SOLUTION: The component for the loudspeaker composed of a sheet product using the triphenyl phosphate flame retarder is used. An annular yoke 1 is composed of an upper plate 1a and a lower plate 1b and an annular magnet 2 is held between them. The annular yoke 1 and the annular magnet 2 constitute a magnetic circuit and a bobbin 3 on which a voice coil 3a is wound is arranged around the center pole 11 of the center of the magnetic circuit. The bobbin 3 is held by a frame 7 via a damper 6. The diaphragm 4 forms a shape of a cone, has a sound reproducing function for transmitting the vibration of the voice coil 3a to the air and its outer periphery is held at the peripheral part of the frame 7 via an edge 5. A center cap 8 is fitted in the center of the diaphragm 4 and a packing 9 is attached to the periphery of the edge 5. A loudspeaker body composed of the component for the loudspeaker is attached to a cabinet 12 and the cabinet 12 functions as a baffle plate and a speaker box. COPYRIGHT: (C)2005,JPO&NCIPI