Spray head structure

Abstract

The invention provides a spray head structure. The spray head structure comprises a pump body, a piston seat, a piston, a piston rod, a connecting base, a spring, a valve plate and a pressing head andis characterized in that an annular groove is formed on the outer peripheral wall of the upper part of the piston seat; an annular convex rib is formed on the inner peripheral wall of the piston rodand is always limited in the annular groove; and a longitudinal movable gap is left between the annular convex rib and the annular groove. The spray head structure has the advantages that the annularconvex rib on the inner peripheral wall of the piston rod of the spray head structure is always limited in the annular groove of the piston seat, and the longitudinal movable gap is left between the annular convex rib and the annular groove, so that the piston rod can move relative to the piston seat, especially when the piston rod is reset upwards under the acting force of the spring, the pistonrod moves in advance of the piston seat; and due to the action of the atmospheric pressure, the cavity interior of the pump body is in a vacuum state, and liquid remaining in the nozzle orifice of thepressing head flows into the pump body to form a backsiphonage effect, so that the oxidation of the liquid remaining in the nozzle orifice is effectively avoided, and the user experience is greatly improved.

Description

technical field [0001] The invention relates to a lotion pump, in particular to a nozzle structure of the lotion pump. Background technique [0002] The nozzle is the core component of the lotion pump, and the performance of the nozzle directly affects the product quality and user experience. Existing nozzle structures generally include a pump body, a piston seat, a piston, a piston rod, a connecting seat, a spring, a valve plate and a press head, wherein the piston seat and the piston are arranged inside the pump body, and the lower end of the piston rod extends into the pump body. The pump body is matched with the piston seat and the piston. The upper end of the piston rod protrudes upwards from the pump body. The connecting seat is installed on the upper end of the pump body. The piston rod maintains an upward reset tendency. When in use, by pressing the pressing head, the emulsion in the bottle can pass through the valve plate and then enter the pump body, and then be ...

AI Technical Summary

Problems solved by technology

There is a tight fit between the piston rod and the piston seat of the existing spray head structure, that is, the piston seat moves up and down synchronously with the piston rod all the time. Although this will not affect the normal operation of the lotion pump, however, after each use of the lotion pump , there will always be liquid remaining in the nozzle opening of the press head, and the remaining liquid will not only drip onto the countertop and stain the countertop, but also, if the interval between each use is long, the liquid remaining in the nozzle opening will also oxidize The phenomenon is not beautiful, but also affects the user experience. In severe cases, the oxidized liquid may even block the nozzle after the oxidized liquid coagulates, causing the lotion pump to fail to work normally.

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