| 摘要 |
PROBLEM TO BE SOLVED: To provide a diaphragm for a speaker, capable of adjusting the minimum resonance frequency f0 without inviting enlargement of a speaker device or decline of a reproduction sound pressure.SOLUTION: A diaphragm 18 is integrally molded by pressing a sheet-like base material, and includes a diaphragm body part 16 and an edge part 17. The thickness D1 of the diaphragm body part 16 is 0.14 mm, the thickness D2 of a boundary part of the edge part 17 and the diaphragm body part 16 is 0.1 mm, the thickness D3 of a projection part 17A of the edge part 17 is 0.09 mm, and the thickness D4 of a holding part 17B of the edge part 17 is 0.14 mm. Since the edge part 17 is molded into the thickness different from the diaphragm body part 16 in such a manner, the minimum resonance frequency f0 is adjusted without affecting an edge width or weight. |
