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Pub. No.:    WO/2009/141912    International Application No.:    PCT/JP2008/059530
Publication Date: 26.11.2009 International Filing Date: 23.05.2008
H04R 1/10 (2006.01), H04R 17/00 (2006.01)
Applicants: Nippon MMI Technology Inc. [JP/JP]; 2nd Floor, Shiba Daiichi Building, 3-2, Shiba 5-chome, Minato-ku, Tokyo 1080014 (JP) (For All Designated States Except US).
NOMURA, Yasuhiko [JP/JP]; (JP) (For US Only)
Inventors: NOMURA, Yasuhiko; (JP)
Agent: ASAHI PATENT FIRM; 7th Fl., Toyo Bldg., 2-10, Nihonbashi 1-chome, Chuo-ku, Tokyo 1030027 (JP)
Priority Data:
(JA) イヤホン装置
Abstract: front page image
(EN)An earphone apparatus (10) has a weight (45) at the free end of a piezoelectric diaphragm (41) to make the resonance point of the piezoelectric diaphragm (41) in a low-frequency band. This enables the piezoelectric diaphragm (41) to generate vibration even in the low-frequency band. Thus, the piezoelectric diaphragm (41) can generate a larger sound in the low-frequency band than that generated by a piezoelectric diaphragm having no weight (45).
(FR)L'invention porte sur un appareil écouteur (10) qui comprend un poids (45) à l'extrémité libre d'une membrane piézoélectrique (41) pour amener le point de résonance de la membrane piézoélectrique (41) dans une bande de fréquences basses. Cela permet à la membrane piézoélectrique (41) de générer des vibrations même dans la bande de fréquences basses. Ainsi, la membrane piézoélectrique (41) peut générer un son plus intense dans la bande de fréquences basses que celui généré par une membrane piézoélectrique n'ayant pas de poids (45).
(JA) イヤホン装置10では、圧電振動板41の自由端に錘45を設けることによって、圧電振動板41の共振点を低周波数帯域に作られるようにした。これにより、圧電振動板41は、低周波数帯域であっても振動を発生されることができ、錘45を設けていない圧電振動板に比べて、低周波数帯域の音を大きく発生させることが可能となる。
Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BR, BW, BY, BZ, CA, CH, CN, CO, CR, CU, CZ, DE, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IS, JP, KE, KG, KM, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LT, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PG, PH, PL, PT, RO, RS, RU, SC, SD, SE, SG, SK, SL, SM, SV, SY, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW.
African Regional Intellectual Property Organization (BW, GH, GM, KE, LS, MW, MZ, NA, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MT, NL, NO, PL, PT, RO, SE, SI, SK, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG).
Publication Language: Japanese (JA)
Filing Language: Japanese (JA)