Importance

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Abstract

A bubble generating device is to be used with a water tank which has a water receiving chamber, and includes a bubble emission member adapted to be disposed in the water receiving chamber and formed with bubble emission holes, an air pump for providing pressurized air, a first air passage tube with a first end connected to the air pump and an opposite second end, and a second air passage tube with a first end connected to the bubble emission member and an opposite second end. The control unit includes a cam wheel, a valve seat formed with an air chamber which communicates fluidly the second ends of the first and second air passage tubes, and a spring-loaded piston rod with a first end portion in contact with a peripheral cam surface of the cam wheel and a second end portion extending into the air chamber and provided with a valve piece. A drive unit is coupled to the cam wheel for driving rotation of the cam wheel so as to permit the cam surface to intermittently push the piston rod toward the air chamber to enable the valve piece to alternatingly block and unblock air flow through the air chamber from the second end of the first air passage tube to the second end of the second air passage tube.

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First Claim