| 摘要 |
PURPOSE:To contrive to produce simply the tool horn with high freedom by providing one slit or more extending longitudinally at each 1/4 wave length in the direction of transverse width for the plate shape member having the transverse width equal to or more than 1/4 wave length, the longitudinal width equal to 1/2 wave length and the thickness equal to or less than 1/8 wave length. CONSTITUTION:A plate shape member has the transverse width equal to or more than 1/4 wave length of an used ultrasonic wave vibration, the longitudinal width equal to 1/2 wave length, the thickness equal to or less than 1/8 wave length and at least one slit or more extending longitudinally at each 1/2 wave length in the direction of the transverse width. Each part of the slit width equal to or less than 1/24 wave length, the column part width being in the range of 1/4-5/24 wave length and the bridge part width being in the range of 2/24-4/24 wave length is caused to be the same in dimension, and said plate shape member is caused to be symmetrical to vertical and horizontal (left and right) direction. The mixing of transverse wave into the longitudinal vibration on the emitting surface 2 is prevented by causing the slit width S to be equal to 1/24 wave length or less, and the longitudinal vibration on the emitting surface is uniformalized. For instance, when two slits, the slit width of 1/24 wave length, the columnpart width W of 1/4 wave length are used, the bridge part width T obtains the resonance frequency corresponding to the dimension in the range of 2/24-4/24 wave length. |
