Abstract:
PROBLEM TO BE SOLVED: To provide a flat panel loudspeaker appropriately available for a thin-shape audio/image display and an audio/image display including the flat panel loudspeaker. SOLUTION: The flat panel loudspeaker includes:a plate-like diaphragm 1; a group of magnets 2 disposed in one line in such a way that two neighboring magnetic poles 2S and 2N become opposite to each other; a plurality of voice coils 3 arrayed along an array direction of the magnets 2 and formed on surfaces of the diaphragm 1 opposite to the magnetic poles 2S and 2N in such a way that the magnetic flux of the voice coils can cross the magnetic poles 2S and 2N; a yoke 4 which is abutted on the other of the magnetic poles 2S and 2N in the magnets 2 and in which a pair of side edges 4A along the array direction of the magnets 2 are bent toward the diaphragm 1; a frame 5 supporting the diaphragm 1 at an edge of the diaphragm 1 and accommodating the magnets 2 and the yoke 4; a speaker supporting member 6 to which the frame 5 is fixed; and an elastic member 7 provided between the speaker supporting member 6 and the yoke 4. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To simplify a manufacturing process. SOLUTION: Each magnet 12 is disposed between projections 100 on a bottom surface 14A of a yoke 14 so as to be located at a predetermined position. Furthermore, a magnetic pole face of each magnet 12 is adsorbed on the bottom surface 14A with a magnetic force so as to be fixed. Therefore, when performing recycling work after collecting a flat speaker 10 from the market, the magnetic 12 can be easily detached. Moreover, it is not necessary to remove adhesives left on the magnets 12 and the yoke 14, either. Namely, disassembly of the magnets 12 and the yoke 14 is facilitated. In such a case, since no adhesive is stuck, the yoke 14 is melted and can also be easily recycled as metal row materials. Furthermore, since it is enough only to dispose each magnet 12 between the projections 100 on the bottom surface 14A of the yoke 14, manufacturing steps are simplified. Moreover, since it is not necessary to leave the magnets and the yoke until the adhesives are hardened, the manufacturing time is shortened. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To enlarge the amplitude of a vibrating surface in simple configuration, with respect to a planer acoustic transducer and a method of manufacturing the planer acoustic transducer. SOLUTION: Even when a vibrating surface 112 of a vibrating film 110 is displaced up and down, namely, even when driving surfaces 114, 115 are displaced up and down, a density of magnetic flux passing the driving surfaces 114, 115 is not changed. Thus, a width of displacement of the vibrating surface 112 can be enlarged. Therefore, sound pressure can be increased more easily than the prior art. Furthermore, lower-register reproducibility also becomes excellent. Moreover, the vibrating surface 112 and the driving surfaces 114, 115 are formed by folding one vibrating film 110, so that the configuration is simplified and manufacturing is also facilitated. COPYRIGHT: (C)2008,JPO&INPIT