| 摘要 |
A draining device for air control equipment has a bottom shell, a top shell, a knob, a switch and a connecting device. The bottom and top shells are connected to each other. The top shell has two inclined recesses. The knob is mounted through the top shell and has two sliding protrusions mounted in the inclined recesses and two tabs. The switch is mounted in the bottom shell and has a button. The connecting device has a connecting tube, a flange and an end protrusion. The connecting tube is mounted through the top shell. The flange is formed around the connecting tube and is mounted across the tabs. The end protrusion abuts the button. When the knob is rotated, the sliding protrusions move along the inclined recesses to force the knob moving downward. Therefore, the end protrusion pushes the button to turn on the switch.
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