DIAPHRAGM FOR ELECTROACOUSTIC TRANSDUCER AND ITS MANUFACTURING METHOD

PROBLEM TO BE SOLVED: To provide a diaphragm for an electroacoustic transducer which is lightweight and highly rigid, has adequate internal loss and superior watertightness, excellent sound quality, and superior productivity by forming the diaphragm of synthetic resin by using a molding method which...

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Bibliographische Detailangaben
Hauptverfasser:	TONEGAWA HIROSHI, NONOGAKI AKIHIRO, NOMURA MANABU, HASHIMOTO YASUJI, SATO HIROSHI, WADA KAORU
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING DEAF-AID SETS ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKEACOUSTIC ELECTROMECHANICAL TRANSDUCERS PERFORMING OPERATIONS PUBLIC ADDRESS SYSTEMS SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS TRANSPORTING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a diaphragm for an electroacoustic transducer which is lightweight and highly rigid, has adequate internal loss and superior watertightness, excellent sound quality, and superior productivity by forming the diaphragm of synthetic resin by using a molding method which reduces independent spaces as much as possible and increasing the cavity capacity of a structure close to a paper-made diaphragm after injection and compression. SOLUTION: The diaphragm for the electroacoustic transducer is molded out of a resin material, obtained by mixing synthetic resin and glass fiber, by expanding the cavity capacity after injection and compression. The resin material has continuous gaps 13 formed inside by using the reaction force of the glass fiber when the resin material expands.