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    • 39. 发明专利
    • Transmitter
    • 发射机
    • JPS58178700A
    • 1983-10-19
    • JP6137582
    • 1982-04-13
    • Kureha Chem Ind Co Ltd
    • ENDOU YASUSHI
    • H04R17/00H04R17/02
    • H04R17/02H04R17/025
    • PURPOSE: To obtain a large output and also to improve an S/N ratio, by sticking the apex part of a diaphragm to a nearly U-shaped spring whose one end is fixed, and also sticking a piezoelectric material having an electrode to nearly center part of the spring.
      CONSTITUTION: A conical diaphragm 2 is provided inside a case 1. The apex 2a of the diaphragm 2 is fixed by adhesion, to one side piece 3a of a U-shaped spring consisting of phosphor bronze, etc., through a damper 4. The end part of the other side piece 3b of this spring 3 is fixed by a supporting member 5. A piezoelectric material 6 is made to adhere to a circular arc-like part 3c in the center of the spring 3. This piezoelectric material 6 is formed like a thin plate, and electrodes 7, 8 are provided on both its surfaces. When the conical diaphragm 2 is vibrated by receiving acoustic pressure, the total displacement of this diaphragm 2 concentrates on its apex 2a. The spring 3 receives said displacement to vibrate its side piece 3a up and down as shown with an arrow (a). The piezoelectric material 6 is bent to generate voltage in accordance with this vibration.
      COPYRIGHT: (C)1983,JPO&Japio
    • 目的:为了获得大的输出并且还提高S / N比,通过将隔膜的顶部部分粘附到其一端固定的几乎U形的弹簧,并且还将具有电极的压电材料粘附到近中心 春天的一部分。 构成:在壳体1的内部设置有圆锥形膜片2.隔膜2的顶点2a通过阻尼器4通过粘合固定在由磷青铜等构成的U形弹簧的一个侧片3a上。 弹簧3的另一侧片3b的端部由支撑部件5固定。压电材料6被制成粘附到弹簧3中心的圆弧状部分3c上。形成压电材料6 类似于薄板,并且电极7,8设置在其两个表面上。 当锥形隔膜2通过接收声压而振动时,该隔膜2的总位移集中在其顶点2a上。 如箭头(a)所示,弹簧3接收所述位移以使其侧部件3a上下振动。 压电材料6被弯曲以根据该振动产生电压。