Patent ID: 6152176
Filing Date: 2000-11-28
Classification: A61G,F16K,Y10T

Abstract:
An air valve structure for an alternately aerated three-pipe style air bed comprising an upper rotation seat, a lower rotation seat and a plurality of micro-switches, wherein,said upper rotation seat is placed over said lower rotation seat, the top of said upper rotation seat is a sealed plane surface and is provided with an upper axle hole, the bottom of said upper axle hole is surrounded by an upper inner intake chamber which is surrounded by an upper external discharge chamber, two stop blocks are provided between said upper inner intake chamber and said external discharge chamber, a notch is formed between said stop blocks and is communicated with said external discharge chamber, a plurality of lugs at different levels are provided at suitable positions on the exterior surface of said upper rotation seat, a driving groove is provided at said upper axle hole on the top of said upper rotation seat;said lower rotation seat provided beneath said upper rotation seat is provided at the center thereof with a lower axle hole, a middle intake pipe and two discharge pipes are provided horizontally at one side on the exterior wall of said lower rotation seat, and three air pipes are provided at the other side on the exterior wall of said lower rotation seat, an annular air chamber is provided surrounding said lower axle hole and is communicated with the interior of said middle intake pipe through a middle air hole, said annular air chamber is provided at a plurality of suitable positions with three intake pipes communicated respectively with the interiors of said three air pipes, two discharge chambers are provided at the lateral sides of said lower rotation seat adjacent to said intake pipes and are communicated with said discharge pipes through two air holes respectively, further, two switch seats are symmetrically provided on the lateral sides of said lower rotation seat;four micro-switches are provided on said switch seats respectively and are locked with a plurality of locking members;said four micro-switches are mounted on said lower rotation seat, then said upper rotation seat is placed over and mounted on said lower rotation seat, an axle of a motor is added externally through said upper axle hole and said lower axle hole to rotate said upper rotation seat on said lower rotation seat, and said axle of motor is mounted to make a fixed angle relative to said driving groove of said upper rotation seat to allow rotation of said axle of motor together with said upper rotation seat on said lower rotation seat;with this arrangement, three sets of elongate air bladders are mutually separated and connected to said three air pipes, said upper rotation seat is activated by said motor to rotate, in this way, said elongate air bladders are all aerated, or alternately aerated and discharged.