PURPOSE: To provide an acoustic filter capable of simplifying and miniaturizing circuit constitution at the time of integrating it into an electronic instrument and reducing the number of production processes, cost and current consumption.
CONSTITUTION: The acoustic filter consists of an air forcible feeding port 1a, a thin groove 1b for forming a thin tube, a recessed part for forming an air tank 1c, a filter body 1 for serially connecting the thin groove 1b and the recessed part to the air feeding port inlet 1a, packing 2 laminated on the body 1 and forming the thin tube 1b and the tank 1c by the thin groove and the recessed part, a plate 3 laminated on the upper face of the packing 2 and pressing the packing 2 in contact with the body 1, and an outlet 2a projecting from the tank 1c to the outside to output air pressure from the tank 1c to the outside.
TERAMOTO TSUTOMU
ASHIDA TAMEO
YANAGI SHINSAKU
