Electroacoustic transducer
Patent 7324655 Issued on January 29, 2008. Estimated Expiration Date: 
July 4, 2023. 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.
July 4, 2023. 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 ReferencesDevice for generating waking vibrations or sounds Electro-mechanical and acoustic transducer for portable terminal unit Electric-mechanical-acoustic converter and method for producing the same Multi-functional vibrating actuator Vibration actuator having an elastic member between a suspension plate and a magnetic circuit device Patent #: 6850138 InventorAssigneeApplicationNo. 10520098 filed on 07/04/2003US Classes:381/370, Headphone381/151, Body contact wave transfer (e.g., bone conduction earphone, larynx microphone)381/396, Electromagnetic (e.g., dyynamic)381/410, Coil coating, winding layer structure, or wire310/36, Oscillating340/388.1, Diaphragm (e.g., horn or buzzer)310/81Unbalanced weight (e.g., vibrators)ExaminersPrimary: Le, HuyenAttorney, Agent or FirmForeign Patent References
International ClassH04R 25/00AbstractA small earphone or headphone which can produce a wide band acoustic output from a low-pitched tone to a high-pitched tone and can generate a body-sensitive vibration independent output or a body-sensitive vibration output synchronized with a music. The earphone or headphone is mounting a vibration actuator which is provided with a magnetic circuit including a permanent magnet, a yoke, and a plate for concentrating the flux of the permanent magnet, with a coil disposed in an air gap of the magnetic circuit, with a diaphragm fixed with the coil and being imparted with a driving force therefrom, and with a vibration transmitting section for supporting the magnetic circuit flexibly through a suspension comprising a flexible spring.Field of SearchElectromagnetic (e.g., dyynamic)Having diaphragm support feature Magnetic circuit Not having central magnetic portion Having central magnetic portion Body contact wave transfer (e.g., bone conduction earphone, larynx microphone) Centering from outside bobbin or diaphragm Spider Wiring structure Coil coating, winding layer structure, or wire Headphone Unbalanced weight (e.g., vibrators) With relatively movable coil and permanent magnet (e.g., D'Arsonval type) position on the cathode ray tube) Diaphragm (e.g., horn or buzzer) With auxiliary flexible membrane With resonance chamber Housing or mounting | |
