| 摘要 |
PURPOSE:To make it possible to lower the minimum resonance frequency by using a domic diaphragm for a passive radiator. CONSTITUTION:In respect to passive radiator 12, the circumference part of domic diaphragm 14 is connected to the circumference edge edge part of edge 15 which is provided on the outside circumference part of dish-shaped frame 13 together with gasket 16 by adhesion. Cylindrical part 17 is provided into one body on the center reverse face of diaphragm 14, and the center of dumper 18 which has the circumference edge part fixed to the inside bottom face of frame 13 is connected to the lower end of this cylindrical part 17. Since the domic diaphragm is used in this manner, the inside capacity of the diaphragm reverse face can be enlarged. As the result, the minimum resonance frequency can be lowered, and constitution is simple and production is easy to improve productivity. |
