Electrical/mechanical/sound converter and apparatus of electrical/mechanical/sound conversion
May 31, 2020. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesLoudspeaker drive mechanism monitoring assembly Electro-vibration transducer Variable frequency vibratory alert method and structure Dual mode transducer for a portable receiver Integrated vibrating and sound producing device Vibration generating apparatus Device for generating calling vibrations or calling sounds in cellular or pager phones Electro-mechanical and acoustic transducer for portable terminal unit Patent #: 6208237 InventorsAssigneeApplicationNo. 486655 filed on 05/31/2000US Classes:381/406, Field coil340/388.1, Diaphragm (e.g., horn or buzzer)340/388.2, Alternating current381/396, Electromagnetic (e.g., dyynamic)381/401Multiple voice coilsExaminersPrimary: Woo, StellaAssistant: Ni, Suhan Attorney, Agent or FirmForeign Patent References
International ClassH04R 025/00Foreign Application Priority Data1998-06-29 JPAbstractAn electro-mechanical-audio converter and an electro-mechanical-audio converting device using the same employed in mobile terminals such as mobile phones for generating paging vibration which realizes stable vibration function. The electro-mechanical-audio converter includes a housing (1a), movable part (2), forming a magnetic circuit, mounted on an opening of the housing (1a) through a suspension (3); and a detection coil (11) disposed near the movable part (2) for generating excitation voltage by vibration of the movable part (2). Strong vibration of the movable part (2) during resonance is detected by the detection coil (11) as an excitation voltage, and fed back. Accordingly, the electro-mechanical-audio converter and electro-mechanical-audio converting device using the same having an extremely stable vibration function, even when resonance frequency changes due to environmental changes such as ambient temperature, is made feasible.Other References
Field of SearchELECTRO-ACOUSTIC AUDIO TRANSDUCERBody contact wave transfer (e.g., bone conduction earphone, larynx microphone) Having electrostatic element (e.g., electret, vibrating plate) Electromagnetic (e.g., dyynamic) Having diaphragm support feature Movable voice coil For different frequencies Multiple voice coils Field coil Pattern Wiring structure Vibratory (i.e., tactual) alarm Diaphragm (e.g., horn or buzzer) TACTUAL INDICATION Alternating current | |
