公开(公告)号：US5955821A

公开(公告)日：1999-09-21

申请号：US899932

申请日：1997-07-24

申请人： Kazuaki Yamamoto ,  Hiroyuki Inami ,  Shuho Saito

发明人： Kazuaki Yamamoto ,  Hiroyuki Inami ,  Shuho Saito

IPC分类号： H04R17/10 ,  G10K9/122 ,  H01L41/08

CPC分类号： G10K9/122

摘要： A piezoelectric electro-acoustic transducer has a substantially decreased resonant frequency without having to modify the size of a piezoelectric diaphragm or the shape of casing members used therein. The piezoelectric electro-acoustic transducer has a piezoelectric diaphragm including a metal plate and a piezoelectric ceramic disc disposed on one surface of the metal plate, wherein the piezoelectric diaphragm is to be supported at its periphery. A plurality of projections are specifically provided for stress transmission suppression at the periphery of the piezoelectric diaphragm in order to suppress or eliminate occurrence of circumferential transmission of a stress at the periphery during activation of the transducer.

摘要翻译： 压电式电声换能器具有大幅降低的谐振频率，而不必改变压电振动膜的尺寸或其中使用的壳体构件的形状。 压电式电声换能器具有压电振动膜，该压电振动膜包括设置在金属板的一个表面上的金属板和压电陶瓷盘，其中压电振动膜将在其周边被支撑。 为了抑制或消除在换能器的启动期间在周边的周向的周向传播的发生，在压电振动膜的周围具体地设置有用于应力传递抑制的多个突起。

公开(公告)号：US5625248A

公开(公告)日：1997-04-29

申请号：US322934

申请日：1994-10-13

申请人： Shuho Saito ,  Isao Okada ,  Osamu Segawa ,  Toshiaki Yamashita

发明人： Shuho Saito ,  Isao Okada ,  Osamu Segawa ,  Toshiaki Yamashita

IPC分类号： H04R17/00 ,  G10K9/122 ,  H01L41/08

CPC分类号： G10K9/122

摘要： A piezoelectric buzzer includes a piezoelectric diaphragm stored in a case having a case body and a back cover, and a pair of metal terminals which are electrically connected to the piezoelectric diaphragm and drawn out from the back cover. The metal terminals have terminal drawing portions, terminal fixing portions which are arranged along an inner surface of the back cover, and connecting portions which are bent from inner ends of the terminal fixing portions so that the bent portions are substantially U-shaped as viewed from above while forward ends thereof are separated from the inner surface of the back cover and brought into contact with the piezoelectric diaphragm.

摘要翻译： 压电蜂鸣器包括存储在具有壳体和后盖的壳体中的压电振动器和与压电振动膜电连接并从后盖引出的一对金属端子。 金属端子具有端子引出部，沿着后盖的内表面配置的端子固定部以及从端子固定部的内端弯曲的连接部，使得弯曲部从大致U字形 其前端与后盖的内表面分离，并与压电振膜接触。

公开(公告)号：US5955824A

公开(公告)日：1999-09-21

申请号：US901598

申请日：1997-07-28

申请人： Shuho Saito ,  Kazuaki Yamamoto ,  Hiroyuki Inami

发明人： Shuho Saito ,  Kazuaki Yamamoto ,  Hiroyuki Inami

IPC分类号： G10K9/122 ,  H04M1/03 ,  H04R1/10 ,  H04R17/00 ,  H04R1/00

CPC分类号： H04R17/00

摘要： A piezoelectric electro-acoustic transducer eliminates a negative influence caused by metal terminals upon the sound pressure and resonant frequency characteristics even when size and thickness reduction of the transducer are made. The transducer includes a piezoelectric diaphragm which includes a piezoelectric ceramic plate and a metal plate stored in a casing. The transducer also includes metal terminals in contact with the piezoelectric diaphragm and extending to the outside of the casing. The modulus of elasticity X of one metal terminal is specifically determined to be within a range defined by: ##EQU1## where E (N/m.sup.3) is the Young's modulus of one metal terminal in contact with a piezoelectric element, b (mm) is the width of part of the metal terminal extending from the inside of the casing to the outside thereof, h (mm) is the thickness of the metal terminal, and L (mm) is the length of the metal terminal.

摘要翻译： 压电电声换能器消除了由金属端子对声压和谐振频率特性造成的负面影响，即使在换能器的尺寸和厚度减小时也是如此。 换能器包括压电振膜，其包括压电陶瓷板和存储在壳体中的金属板。 换能器还包括与压电振膜接触并延伸到壳体外部的金属端子。 一个金属端子的弹性模量X具体确定在以下范围内：E（N / m3）是与压电元件接触的一个金属端子的杨氏模量，b（mm）是 金属端子的一部分从壳体的内部延伸到外部，h（mm）是金属端子的厚度，L（mm）是金属端子的长度。