Ultrasonic cleaner and wet treatment nozzle comprising the same

An ultrasonic cleaner comprising:

• a housing having a U-shaped cross section, comprising an inner and an outer U-shaped portion, and a hollow portion there between;
• an ultrasonic transducer placed on an inner bottom surface of the inner U-shaped portion of the housing;
• a liquid for preventing empty heating charged into the hollow portion to transmit vibration from the ultrasonic transducer to an outer bottom surface of said outer aped portion of the housing;
• and
• a weight provided on the housing to prevent the vibration of a wall of the housing.

An ultrasonic cleaner comprising:

• a first housing having a U-shaped cross section including an outer wall having an end portion;
• a rim extending from the end portion of the outer wall;
• an ultrasonic transducer placed on an inner bottom surface of the U-shaped first housing;
• a second housing having a center portion that is depressed and has an end portion including a rim along said end portion that is arranged around said first housing whose end portion of its outer wall has a rim there along, such that a hollow portion is formed between the first housing and the second housing by sandwiching a packing between the end portions of the housings;
• a liquid for preventing empty heating charged into the hollow portion to transmit vibration from the ultrasonic transducer to the outer bottom surface of the second U-shaped housing;
• and
• a weight provided on a housing to prevent the vibration of a wall of the housing.