Patent ID: 6832630
Filing Date: 2004-12-21
Classification: A47C,A61G,F15B,F16K,H01Q,Y10T

Abstract:
An adjustable air supply valve of an air cushion bed having an air supply valve installed between a first tube and a second tube; the air supply valve comprising a round seat, an air valve, a cover plate, a locking plate and a driving element, whereinthe round seat is clamped between the first tube and the second tube; the round seat is a hollow cylinder with a plate in the middle section within the cylinder for assembling the air valve; a first notch is formed at a lateral side of the round seat; a first lock hole and a second lock hole are formed at a periphery of the round seat; the air valve has a size slightly smaller than the round seat and is rotationably installed to the round seat; a lateral side of the air valve has three cambered plates; three notches are formed between the plates; at a side opposite the cambered plates are installed with a protruding ring; a monitoring notch is formed on the protruding ring; a plurality of posts are installed at inner sides of the cambered plates; each post has a third lock hole; the cover plate serves to cover the air valve and has a shape approximately corresponding to that of the air valve; the cover plate has through holes at positions corresponding to the posts; a center of the cover plate is installed with a central hole; a plurality of screws are used to lock the through holes to the third lock holes; thereby, the cover plate is locked to the air valve; the locking plate has an aperture at a center thereof; a fourth lock hole is formed on a periphery of the locking plate; a second screw serves to lock the locking plate to the first lock hole; and a driving element is a step motor and a periphery thereof has a plurality of fifth lock holes; the driving element is locked to the second lock hole by screwing screws to the fifth lock holes; a driving block is formed on a center of the driving element; a shape of the driving block is exactly identical to the central hole; in assembly, the air valve is exactly received in the round seat; the protruding ring is embedded in the annular trench; the cover plate, locking plate and driving element are sequentially placed upon the air valve; the driving block is exactly buckled in the central hole; the round seat is locked with the locking plate and driving element; thereby, the air valve and cover plate are combined, by the driving block of the driving element to drive the central hole; the air valve is rotatable in the round seat.