| 摘要 |
PROBLEM TO BE SOLVED: To enhance driving efficiency more in a speaker of small distortion. SOLUTION: On the side closer to a magnetic circuit 1 than a vibration cone 3, a damper 10 having an inner circumferential end connected with a voice coil body 2 and an outer circumferential end connected with a frame 5 through a second edge 11 is provided. The second edge 11 projects to the vibration cone 3 side or the opposite side thereof, and the damper 10 has a first protrusion 10a protruding toward the vibration cone 3 side, and a second protrusion 10b protruding in the direction opposite to the first protrusion 10a. Out of the first and second protrusions 10a and 10b, the protrusion 10a protruding in the direction opposite to the protruding direction of the second edge 11 on the inside of the protrusion closest to the second edge 11 is made larger than the other protrusion. COPYRIGHT: (C)2007,JPO&INPIT |
