| US 7,580,542 B2 | ||
| Loudspeaker apparatus | ||
| Yoshio Ohashi, Kanagawa (Japan); and Masaru Uryu, Chiba (Japan) | ||
| Assigned to Sony Corporation, (Japan) | ||
| Filed on Sep. 22, 2005, as Appl. No. 11/233,416. | ||
| Claims priority of application No. 2004-292875 (JP), filed on Oct. 05, 2004. | ||
| Prior Publication US 2006/0072777 A1, Apr. 06, 2006 | ||
| Int. Cl. H04R 25/00 (2006.01) | ||
| U.S. Cl. 381—430 [381/398; 381/423] | 5 Claims |
| 1. A loudspeaker apparatus, comprising:
a loudspeaker diaphragm formed by joining a domed diaphragm and an edge diaphragm, and operable to vibrate using a voice coil,
and
a reinforcement ring reinforcing and adhered to a junction flat portion between said domed diaphragm and said edge diaphragm,
wherein the reinforcement ring is adhered to the junction flat portion during the joining of the domed diaphragm and the edge
diaphragm by molding,
wherein said reinforcement ring is formed of a permeable material other than paper and has air permeability resistance of
100 seconds or less as the permeable capacity, such that substantially no air is between the reinforcement ring and the junction
flat portion after the reinforcement ring has been adhered to the junction flat portion.
|