| 摘要 |
PURPOSE:To attain reproduction of low sound by using a suspension where the interval of corrugation is not constant over the entire peripheral length and a part of the corrugation is cut off to realize the suspension having sufficient flexibility even if the short diameter of the aperture of the speaker is small. CONSTITUTION:Even when the outer diameter of the suspension 2 is restricted by the shorter diameter of the speaker aperture, it is possible to increase the size of suspension toward the large diameter of the speaker aperture in this invention. A cut part 3 is provided to the corrugation because the interval of corrugation is different depending on the direction, if no cut part is provided, the flexibility is changed with the peripheral direction, the minimum resonance frequency of the speaker depends on the smallest flexibility at the shortest diameter and the effect reproducing the low sound is not improved. Then a part of the corrugation is cut off so as to separate the corrugation. In such a suspension 2, the center part is displaced by the amplitude of the speaker voice coil, then the short diameter side starts being expanded. Since the cut part 3 exists, this part is deformed and larger amplitude is attained. |
