PURPOSE: To provide the vibrator application section whose packing density of the exterior is high enough to give the high air tightness to a hollow as needed without leaving the remainder in the hollow and requiring a small number of parts and assembly manhour and less susceptible to damages and cracking.
CONSTITUTION: An exterior body 1 consists of an insulated resin structure having hollows 11 and 12, and the opposite thick section has holes 13 and 14 ranging from the inside to the outside of the hollows 11 and 12. A vibrator 2 including a vibration area A and non-vibration area B is arranged in the hollows 11, 12 to separate the hollows 11, 12 into holes 13, 14. The vibration area A is located in the hollows 11, 12, and one part of the non-vibration area B is buried the exterior body 1.
KATO IKUO
TOGASHI KOICHI
