Ultrasonic nebulizer

1. An ultrasonic nebulizer comprising:

a working tank in which an ultrasonic vibrator is incorporated and in which a working liquid is stored facing the ultrasonic vibrator;

a medicine tank that stores a medicinal liquid, at least a bottom portion of the medicine tank being dipped in the working liquid; and

a main body that includes (i) a containing portion for surrounding and containing the working tank, (ii) an oscillation circuit that is configured to drive the ultrasonic vibrator, and (iii) main body-side contact electrodes that are configured to emit an output of the oscillation circuit, wherein:

the medicine tank is configured to be detachable with respect to the working tank,

the working tank is configured to be detachable with respect to the main body,

the working tank includes rod-shaped tank-side contact electrodes that extend in a vertical direction along an outer wall of the working tank, specific portions corresponding to portions in a circumferential direction of outer circumferential surfaces of the tank-side contact electrodes are exposed from the outer wall, and the remaining portions other than the specific portions in the circumferential direction of the outer circumferential surfaces of the tank-side contact electrodes are embedded inside of the outer wall and are connected to electrodes of the ultrasonic vibrator,

when the working tank is mounted on the main body, the main body-side contact electrodes come into contact with the specific portions of the outer circumferential surfaces of the tank-side contact electrodes, and

the main body-side contact electrodes (i) have elongated rod shapes, (ii) are configured to slide in a lengthwise direction in lateral holes penetrating through a side wall of the containing portion, and (iii) are biased by elastic members, in an orientation in which leading ends of the main body-side contact electrodes are exposed from the side wall in the lengthwise direction.

2. The ultrasonic nebulizer according to claim 1 , wherein:

the tank-side contact electrodes are provided at portions on mutually opposite sides of the outer wall of the working tank, and

the main body-side contact electrodes are provided facing each other in a horizontal direction on the side wall of the containing portion.

3. The ultrasonic nebulizer according to claim 1 , wherein

the tank-side contact electrodes have circular rod shapes.

4. The ultrasonic nebulizer according to claim 3 , wherein:

first tapered surfaces that are tapered are provided on lower ends of the tank-side contact electrodes, and

second tapered surfaces that are tapered are provided on the leading ends of the main body-side contact electrodes.

5. The ultrasonic nebulizer according to claim 4 , wherein:

the entire circumference of the outer circumferential surface of an upper portion of each tank-side contact electrode is embedded inside the outer wall, and

O rings are fit into the upper portions of the tank-side contact electrodes so as to provide a sealing property between the upper portions of the tank-side contact electrodes and a wall of the working tank that surrounds the upper portions.

6. The ultrasonic nebulizer according to claim 5 , wherein:

ring-shaped grooves are formed around portions the upper portions of the tank-side contact electrodes that are above the O rings, and

the tank-side contact electrodes are connected to the electrodes of the ultrasonic vibrator via E rings that are press-fit into the ring-shaped grooves.

7. The ultrasonic nebulizer according to claim 1 , wherein

lower ends of the tank-side contact electrodes are located above the lowest portions of the working tank.

8. The ultrasonic nebulizer according to claim 1 , wherein

the tank-side contact electrodes are made of titanium.