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US 7,010,140 B2Granted
Electroacoustic transducer
AssigneeCitizen Electronics Co., Ltd.
InventorMasahito Furuya
Life of this patent
Estimating the term…
Abstract
A plurality of grooves are radially formed in an annular frame and an annular plate is secured to the frame to form a sound discharge hole in each groove, thereby communicating a back chamber under a diaphragm with the atmosphere. A projected part is outwardly projected from a peripheral edge of the annular plate, and an adhesive is adhered to a peripheral edge of a protector and to an upper surface of the projected part to adhere the protector with the annular plate.
Claims4
An electroacoustic transducer comprising:
- a frame having an annular peripheral projection and an annular shoulder formed on an inside wall of the peripheral projection;
- a diaphragm provided in the frame;
- a protector provided above the diaphragm;
- slits axially formed in the peripheral projection;
- grooves radially formed in the shoulder, each of the grooves being communicated with a corresponding slit;
- an annular plate secured to the shoulder to form a sound discharge hole in each groove, thereby communicating a back chamber under the diaphragm with the atmosphere;
- projected part outwardly projected from a peripheral edge of either the diaphragm or the annular plate;
- an adhesive adhered to a peripheral edge of the protector and to an upper surface of the projected part.
5 more elements
Dependencies are inferred from the claim text.