| 摘要 |
PURPOSE:To select the frequency characteristic of a speaker and characteristics such as tone quality freely, by fitting a resonating material, which has a part brought into contact with the center of a piezoelectric diaphragm which has the peripheral part fixed, to a frame attachably and detachably. CONSTITUTION:Lead wires 1a and 1b are connected to the piezoelectric element and the metallic plate of a piezoelectric vibration diaphragm 1. A diaphragm supporting jig 2 is constituted by providing a ring-form projection in the peripheral part of an insulating plate, and the peripheral part of the diaphragm 1 is fixed to this projection by an adhesive or the like. A vibration transfer terminal 3 is fitted to the center of the diaphragm 1. A resonating material supporting terminal 5 is fitted in a position facing to the vibration transfer terminal 3 of a frame 4, and a resonating material 6 is fixed between the resonating material supporting terminal 5 and the vibration transfer terminal 3 attachably and detachably. |
