Ultrasonic vibration device
AssigneeMurata Manufacturing Co., Ltd.
InventorKenji Matsuo
Life of this patent
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Abstract
In an inner bottom surface of a case, a substantially oblong recess having a long axis and a short axis forms a vibration area. A piezoelectric element is bonded to the center of the recess. On the opposite sides of the vibration area, vibration suppression areas thicker than the vibration area are disposed. A side portion of the case is formed to be thin over the entire circumference thereof. A reinforcing member higher in rigidity than the case is bonded to upper portions of the vibration suppression areas. The reinforcing member has a bottom surface substantially equal to the shape of the vibration suppression areas, and has a predetermined height. A gap between the reinforcing member and an inner side surface of the case is also filled with a filling member.
Claims17
An ultrasonic vibration device comprising:
- a case having a side portion and a bottom, the side portion and the bottom defining an interior area and an inner bottom portion, the inner bottom portion of the case defining a vibration area and a vibration suppression area, a thickness of the vibration suppression area being greater than that of the vibration area;
- a piezoelectric element adjacent the vibration area of the case;
- a reinforcing member having a greater rigidity than that of the vibration suppression area and disposed adjacent the vibration suppression area;
- and
- an elastic resin filling the interior area of the case.
Dependencies are inferred from the claim text.