Constant flowrate water saving valve and shower head using the same

A shower head using a constant flowrate water saving valve comprising:

• a shower head main body having a valve receiving portion,
• a constant flowrate water saving valve attached to the valve receiving portion of said shower head main body and having at least one liquid radial outflow opening, and
• a shower head discharge port attachment having a peripheral wall by which the liquid discharged from the liquid radial outflow opening in said constant flowrate water saving valve is limited to the direction of the outflow axis, said constant flowrate water saving valve comprising a main valve body in the form of a cylindrical body having a peripheral wall, a first inner diameter portion of inner diameter r.sub.1 on one axial end side, a second inner diameter portion of inner diameter r.sub.2 on other axial end side (r.sub.1 >r.sub.2), a conical-shaped valve seat surface connecting said first and second inner diameter portions, a liquid inlet opening on the side associated with said first inner diameter portion, a ventilation opening of diameter rb on the bottom wall of the side associated with said second inner diameter portion, and a plurality of liquid radial outflow openings of diameter r.sub.a extending through the peripheral wall to cross the main valve body axis, and a movable valve member axially movably received in said main valve body, said constant flowrate water saving valve being arranged such that when said movable valve member comes into perfect valve seat abutment against said conical-shaped valve seat surface, the side of said main valve body associated with the liquid inlet opening communicates with the outside through the upper edge-side opening portions of said plurality of liquid radial outflow openings and the side of said main valve body associated with the ventilation opening communicates with the outside through the lower edge-side opening portions of said plurality of liquid radial outflow openings, and the external air is sucked in through said plurality of liquid radial outflow openings and to be mixed with the water, in which mixed state it is discharged into the outside through said ventilation opening.