| 摘要 |
PROBLEM TO BE SOLVED: To improve amplitude linearity characteristics nearly whatever damper is combined with by connecting a diaphragm adhesion part and the tip part of a raised part raised linearly from a frame joint part by an arc part as to an elastically deformable roll part between the diaphragm adhesion part and frame adhesion part. SOLUTION: The diaphragm adhesion part 121 and frame adhesion part 122 are projected horizontally to the right and left from both ends of the roll part 123 at both sides of the edge 12 which supports the outer periphery of the diaphragm of a speaker. Then the roll part 123 is sectioned in an inverted U shape which spreads connecting straight lines L1 and L2 and an arc 124 together, and the straight lines L1 and L2 are at an angleα, of' 10 deg.. to a line perpendicular to the straight line passing connection points A and B between the roll part 123 and diaphragm adhesion part 121, and frame adhesion part 122. Then the edge 12 has the diaphragm adhesion part 121 adhered to the outer periphery of' the diaphragm so that the roll part 123 projects to in front of the speaker, and the frame adhesion part 122 is adhered to the frame to support the outer periphery of the diaphragm.
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