Patent ID: 7134450
Filing Date: 2006-11-14
Classification: F16K,Y10T

Abstract:
1. An interior structure of a water control valve for faucets, including a control valve body, a control valve stem, and a valve plug wherein the control valve body of a two-stepwise cylinder is equipped with an upper coupling end with a valve stem hole defining therein, a pair of positioning slide blocks symmetrically extending at preset positions thereon, and two sealing O-rings mounted at the middle section thereof; inside the lower step of the control valve body thereof is disposed a valve chamber communicating with the valve stem hole thereof and having a pair of limiting blocks symmetrically protruding at preset inner wall thereon, a pair of water outlet ports symmetrically cut at proper positions thereon to be mutually connected with the valve chamber thereof, and a pair of retaining grooves symmetrically preset at the water outlet ports thereof; the control valve stem is equipped with an upper engaging end, a plurality of water sealing rings mounted at preset positions thereon, an abutting block with a retaining ring properly disposed thereof, and a linkage rib extending at the bottom side thereon; a stop disc is equipped with an elongate inserting slot disposed at the center thereof and a pair of abutting flanges symmetrically extending downwards at the bottom outer edge thereon; an upper switch valve, having plane edges symmetrically cut at both sides thereof, is provided with an elongate inserting recess indented at the center of the top side thereon, and water inlet chambers each defined by an arcuate surface tilting downwards from both cut edges to the central point thereof; a lower switch valve has a pair of protrusive locating blocks symmetrically disposed at both sides of the outer periphery thereof, and a plurality of water inlet ports disposed at the top surface thereon with a water inlet passageway formed therein; the present invention being characterized by that, the lower switch valve is provided with a connecting cavity disposed at the inner bottom end therein, and the valve plug has a central water inlet hole with a support face formed therein, a connecting end protruding at the upper side thereof with a retaining space defining the outer periphery thereon, an upper water sealing ring protruding at the top edge of the connecting end thereon, and a plurality of lower water sealing rings appropriately mounted at the lower end of the valve plug thereof; therefore, in the status of water supply, high water pressure generated by the water flow passing through the water inlet hole of the valve plug will expand outwards the upper and lower water sealing rings of the valve plug thereof to respectively abut tight against the inner wall of the connecting cavity of the lower switch valve and that of the valve chamber of the control valve body for more accurate and secure mutual engagement therewith so as to achieve the best leakage-proof effect thereby; meanwhile, via appropriate abutting effect of the support face of the valve plug pushed by the water flow thereof, the upper edge of the connecting end of the valve plug is strengthened in a closer and tighter engagement with the connecting cavity of the lower switch valve with a proper buffering effect formed in the process thereof so as to effectively avoid the problem of water leakage.