| 摘要 |
<p>The present invention makes it possible to enlarge an internal loss, further trim weight without lowering stiffness and environmental resistance, and increase the maximum sound pressure. A speaker diaphragm (2) and a plurality of dimples (16) are provided, the dimples being radially arranged from the center toward the outside of the speaker diaphragm (2) and having an arch structure in the form of a recess so that stress can be dispersed. Thereby, while trimming the weight of the speaker diaphragm (2) by the plurality of recessed dimples (16), high stiffness can be maintained by the arch structure of the dimples, and the maximum sound pressure can be increased because of the lighter weight.</p> |
