Pressing type emulsion spray nozzle

Abstract

The invention discloses a pressing type emulsion spray nozzle, which comprises a head cap, a valve rod, a bottle cap and a pump assembly, and is characterized in that: a piston is arranged in a pump body and comprises a shaft neck and a sealing ring projecting outwards radially along the outer wall of the shaft neck; a circle of annular groove with an upward opening is formed on the outer wall of an ejector rod, and can be in splicing fit with the bottom edge of the shaft neck of the piston to realize sealing between the ejector rod and the piston; the piston is provided with a rib on the inner wall of the shaft neck; and the ejector rod is provided with a circle of circumferential convex ring, which can be tightly pressed against the rib, on the upper part of the annular groove. Compared with the prior art, the spray nozzle has the advantages that: the inner wall of the piston is provided with the rib and the outer wall of the ejector rod is provided with the convex ring, so that the piston can still move upwards along with the ejector rod under the action of friction between the rib and the convex ring in the resetting process of the ejector rod, a liquid absorption channel between the piston and a top plate can continually keep open, and emulsion left in the spray nozzle can be absorbed back into the pump body.

Description

technical field [0001] The invention relates to a miniature liquid spraying device, in particular to a press type emulsion spray head. Background technique [0002] With the continuous advancement of science and technology and the continuous improvement of people's living standards, a large number of emulsion nozzles are widely used in various living and working occasions. For example, the Chinese utility model patent "Emulsion Pump with Self-locking Mechanism" with the patent No. ZL02248044.7 discloses such a structure of an emulsion spray head, which includes a press head, a thread, a body, a main post, a piston, a spring and an upper and lower order. Directional valve; it is characterized in that the outer wall of the main column is provided with guide ribs in the axial direction; the thread is provided with a guide tube covering the outer wall of the main column, and the inside of the guide tube is provided with an axial guide that allows the guide ribs on the main colum...

AI Technical Summary

Problems solved by technology

[0003] However, the biggest problem in the trial process of the above-mentioned patents is: after the test spraying of the emulsion nozzle, there will be liquid residue in the mouth of the nozzle, that is, the liquid sucked up to the mouth of the nozzle cannot be sucked back into the pump body in time, thus causing As a result, the residual liquid after the trial spraying is easy to drip from the mouth of the nozzle, causing pollution to the use environment (such as the desktop, the ground, etc.), which is not conducive to the cleaning and environmental protection of the nozzle bottle mouth, but also causes waste of sprayed liquid

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