Reduced size electro-acoustic transducer with improved terminal

Details Reduced size electro-acoustic transducer with improved terminal Reduced size electro-acoustic transducer with improved terminal

1997-07-28

1999-09-21

Dougherty, Thomas M.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310324, H04R 1700, H04R 100

Patent

active

059558245

ABSTRACT:
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.

REFERENCES:
patent: 3700938 (1972-10-01), Bryant
patent: 3849679 (1974-11-01), Massa
patent: 3855693 (1974-12-01), Umbaugh
patent: 4006371 (1977-02-01), Quirke
patent: 4092463 (1978-05-01), Wurmb et al.
patent: 4439640 (1984-03-01), Takaya
patent: 5486682 (1996-01-01), Rysemus
patent: 5594292 (1997-01-01), Takeuchi et al.
patent: 5770915 (1998-06-01), Sumita et al.
patent: 5801474 (1998-09-01), Sakairi

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