Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Diaphragm and loudspeaker unit using the same










Image Number 4 for United States Patent #8135165.

A diaphragm, and a loudspeaker unit using the same, capable of providing better low-tone characteristics than conventional ones. A loudspeaker unit includes a base frame and a cover plate joined to each other to provide a flat casing. Arranged in the casing are a diaphragm and a drive mechanism for vibrating the diaphragm. The diaphragm consists of a rectangular area and a pair of semi-elliptic areas, spreading rightward and leftward from the rectangular area, and has an elliptic central portion having its major axis in the longitudinal direction of the diaphragm and a peripheral portion spreading around the central portion. The central portion includes an adhesive layer for fixing a coil, laid on a central area of a diaphragm body, and is formed thicker than the peripheral portion.








 
 
  Recently Added Patents
Navigation device, navigation method, and navigation program
Process for producing .beta.-sialon fluorescent material
Toner for developing electrostatic charge image, electrostatic charge image developer, toner cartridge, process cartridge, image forming method, and image forming apparatus
SMS transport resource control
Method for preparing an organic film at the surface of solid support under non-electrochemical conditions, solid support thus obtained and preparation kit
Emergency whistle, flashlight, and compass
Optical disc drive having a tray for loading a disc using supporting portions
  Randomly Featured Patents
Seat adjuster with inertia lock
Desk with removable program playing device
Non-volatile semiconductor memory device
Magnetic holder for objects
Web winding drive control method
Projection type display apparatus
Carbamate and carbonate salts of tertiary amines
Tire inspection device
Anti-siphon and backflow prevention valve
Recovering material