The utility model relates to an improved structure of a nipple intake valve.The nipple system is provided with an air inlet valve with a hollow conduit on one ring retaining edge.The air inlet valve is connected to the ring baffle edge by a communicating opening at one end of the hollow conduit.The bottom of the other end is closed.The air intake valve is provided with a small cross-sectional inclined air guide lip hole at the fitting position of the peripheral surface of the hollow conduit.The external incision of the inclined air guide lip hole is lower than the internal incision and has an internal high external low inclined upward cutting hole section.The oblique cutting air guide lip hole is formed into a reverse stop face which can intake air and block the inertia backflow of fluid.When the internal incision of the air guide lip hole is cut into the air bottle from the air intake to the external incision,The fluid in the milk bottle is caused byThe external incision is in the direction of high internal and low external oblique upward incision, forming a reverse stop face from low to high anti flow liquid.It can effectively prevent the flow in the bottle from flowing from the external incision at the low point to the internal incision at the high point.The utility model can prevent leakage and flattening of sucking nipple.And the scope of the incision can be reduced by using the inclined air guide lip hole to present a small cross-sectional section on the peripheral surface of the hollow conduit.Furthermore, the axial structural strength of the hollow tube is not affected, so as to effectively prevent the air inlet valve of the nipple from breaking.一種奶嘴進氣閥結構改良，其奶嘴本體係於一環擋緣上一體延設一具中空導管之進氣閥，該進氣閥於中空導管之一端呈連通開放口一體連結於環擋緣上，另一端底部呈封閉狀，其中該進氣閥於中空導管周邊面適位處橫向剖設一小橫切段之斜切導氣唇孔，該斜切導氣唇孔之外部切口較低於內部切口呈內高外低斜切向上切孔斷面，使該斜切導氣唇孔形成一可進氣及阻卻流體慣性倒流之逆止流面孔，令當斜切導氣唇孔之內部切口在進氣至外部切口入氣奶瓶內的同時，其奶瓶內之流體因該斜切導氣唇孔之內、外部切口呈內高外低斜切向上切口走向形成由低往高防流質液體倒流之逆止流面孔，即可有效阻卻防礙瓶內流體難以由低點之外部切口流向高點之內部切口，達到防滲漏及達到吸吮奶嘴防變型變扁之作用，且利用該斜切
