A space-saving concealed vacuum bottle piston structure

Abstract

This utility model discloses a space-saving concealed vacuum bottle piston structure, relating to the field of cosmetic container technology. It includes a first outer bottle, a first bottom stopper, a first concealed piston, a first inner bottle, a gasket, a first shoulder sleeve, a first plastic spring, a first pump core assembly, a first pump head, and a first outer cap. The first inner bottle is inserted inside the first outer bottle, and the first concealed piston is slidably connected to the inner cavity of the first inner bottle. A gasket is provided on the outer side of the top of the first inner bottle, and a threaded portion is provided on the outer side of the top of the first inner bottle. The first shoulder sleeve is threadedly connected to the mouth of the first outer bottle. This space-saving concealed vacuum bottle piston structure, through two proposed concealed vacuum bottle piston schemes, compared to conventional vacuum piston bottle structures, allows for adjustments to the inner liner and piston while maintaining the same capacity, resulting in a shorter bottle height and smaller volume, thereby saving materials and reducing the overall bottle space, thus achieving the goal of space saving.

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