Liquid flow one-way valve and water toothpick

Abstract

The invention discloses a liquid flow one-way valve arranged at a liquid flow inlet / outlet. The liquid flow one-way valve comprises a sleeve, a sealing part and a duckbilled part, wherein two ends ofthe sleeve are respectively a liquid inlet end and a liquid outlet end; the sealing part is arranged on the outer wall of the liquid inlet end of the sleeve and outwards bulges to form a circle of bosses; the duckbilled part is arranged in the sleeve and forms a duckbilled shape composed of a pair of inclined surfaces converging and extending from the top end of the duckbill from the inner wall ofthe sleeve; a slit on one side of the discharged liquid flow on the top of the duckbill is positioned at the liquid outlet end of the sleeve; and when the liquid inlet end is positioned in a negativepressure, the slit of the duckbill is closed to prevent the liquid flow from passing. Meanwhile, the invention further provides a water toothpick using the liquid flow one-way valve. The sealing reliability of the one-way valve is greatly improved, the strength of the one-way valve is improved, the pressure borne by the one-way valve is increased, deformation failure of the one-way valve under reversed compression is avoided, the water outlet slit of the duckbill is prevented from being torn, and the service life is prolonged; and the water toothpick is smooth in liquid inlet and liquid outlet and excellent in leakage-proof effect.

Description

technical field [0001] The invention belongs to the technical field of tooth cleaning appliances, and more specifically, the invention relates to a liquid flow check valve and a tooth cleaning device using the liquid flow check valve. Background technique [0002] The duckbill valve of the prior art is commonly called as: rubber blowdown check valve, claims again: back pressure type flexible check valve, and this valve does not have any moving parts, exempts from any maintenance. The valve can be matched with straight pipes, flange pipes, cement pipes, and glass steel pipes. The duckbill valve is made of elastic neoprene and man-made fibers through special processing, and its shape is similar to a duckbill, so it is called duckbill valve. Under the condition of no internal pressure, the outlet of the duckbill closes under the action of its own elasticity; as the internal pressure gradually increases, the outlet of the duckbill gradually increases to keep the liquid discharge...

AI Technical Summary

Problems solved by technology

[0003] At present, the duckbill valve mechanism used in the flow channel of the toothwasher in the prior art is made of soft rubber, so the water outlet of the duckbill valve mechanism with this structure is very thin during use. Under the impact of strong water pressure, on the one hand, the duckbill valve made of this soft rubber is easily torn at the water outlet cutout; on the other hand, when negative pressure is formed inside the pump, an inward suction force will be generated, which will The water outlet is rolled inwards and deformed, so that the water flow cannot be stopped, which makes it difficult to enter or drain the liquid

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