| 摘要 |
An electrodynamic transducer (9) includes a frame (10), a magnet assembly (12, 13, 14) providing a magnetic field across an air gap (15), a voice coil (17), a coil former (16) for supporting the voice coil (17) in the air gap (15), a diaphragm (18) having an outer perimeter and an apex, and a surround (19) coupled to the outer perimeter and the frame (10) to support perimeter from the frame (10). A spider (20) is coupled to the coil former (16) to support the voice coil (17) in the air gap (15). The coil former (16) is coupled to the apex so that current through the voice coil (17) causing the voice coil (17) to move in the air gap (15) causes the diaphragm (18) to move. The spider (20) has convolutions (20-3--20-10) radially outward from the coil former (16). The surround (19') may also have convolutions radially outward from the outer perimeter. The convolutions (20-3--20-10) include truncated arcs.
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