Patent ID: 8217284

Claim:
An anti dumping switch comprising: a cylindrical and hollow housing, a bottom surface connected to the housing, a first switch end, a second switch end, a cylindrical conductive bush, and two conductive balls, the housing and the bottom surface cooperatively defining a accommodating space, the first switch end extending into the accommodating space through the bottom surface and fixed in the bottom surface, the balls being received in the accommodating space, wherein when the anti dumping switch is flat the balls electrically connect the first switch end and the second switch end and when the anti dumping switch is dumped the balls disengage with the first switch end, wherein the first switch end is disposed at substantially a center of the bottom surface, the second switch end being disposed adjacent to the housing, the bush being received in and extending a height of the accommodating space and configured to encircle an interior cylindrical surface of the housing and connected to the second switch end, the bush comprising a slope surface disposed adjacent to the bottom surface that make the balls contact or disengage the first switch end.