| 摘要 |
A foam spray head assembly includes a press head (1) connected to a cap, a netted tube (3) , a valve member (4), a main tube (5), a piston unit (6,61,62), a link unit (7), a resilient member (8), a cylinder unit (9) and a valve (10). The netted tube is connected to the valve member. An outlet is defined between the first link (71) of the link unit (7) and the first tube (51). An inlet (722) is defined between the second link of the link unit and the protrusion of the piston unit. The resilient member is mounted to the second tube (52) and contacts the flange (53) of the second tube. The first piston of the cylinder unit is movable in the first cylinder to form a sealed second chamber. The second piston of the cylinder unit is movable in the second cylinder to form a sealed third chamber. The valve is located in the passage of the second cylinder. |
