Elastic Pumping Member for Cosmetics Case Leakage Prevention
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Solution Overview
Problem
Existing compact cases for liquid cosmetics have complex structures with airless pumps, leading to increased assembly time, manufacturing costs, and leakage issues during decompression vacuum tests, with uneven discharge of content.
Innovation Solution
A simplified structure using a pumping member with a valve member, nozzle member, and bellows part made of elastic materials to control content discharge, reducing the number of components and preventing leakage by integrating the valve member with the pumping member and using a decompression support to maintain the undercut part closed during vacuum tests.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If an airless pump is provided to discharge liquid content, then the liquid content can be discharged, but the structure becomes complicated and manufacturing costs increase
Solution Approach 1:
The valve member is integrated with the pumping member by forming it as a unitary structure, eliminating the need for separate valve components and their associated assemblies. This merging reduces the total number of parts, simplifies the overall structure, and lowers manufacturing costs while maintaining the dual function of pumping and valve operation.
Solution Approach 2:
The pumping member is designed to perform multiple functions: it acts as both the pumping element and the valve member. The integrated structure allows the same component to control fluid flow direction and generate pumping action, reducing device complexity while maintaining full functionality.
2Reliability
If the inner piston is vertically elevated to open and close the discharge hole, then the discharge hole can be controlled, but content leakage occurs during decompression vacuum test
Solution Approach 1:
The valve member is divided into distinct functional zones: an undercut part that forms a seal interface, a bellows part for elastic deformation, and integration with the pumping member. This segmentation allows each zone to perform its specific function optimally while maintaining overall reliability and preventing leakage during vacuum tests.
3Ease of operation
If the button unit is pushed to discharge content, then content discharge is achieved, but the discharge is sharp and uneven due to internal pressure
Solution Approach 1:
The bellows part is designed to be elastically deformable, allowing it to dynamically adjust its volume and shape in response to pressure changes during operation. This dynamic elasticity enables smooth, controlled discharge of content by gradually releasing pressure rather than sudden release, improving ease of operation.
Solution Approach 2:
The elastic material properties of the bellows part allow for controlled parameter changes in pressure and volume during the discharge process. By utilizing the elastic deformation characteristics, the system transforms the pressure parameter to achieve smooth, uniform content discharge rather than sharp release.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution reduces manufacturing costs, prevents content leakage during vacuum tests, and ensures smooth, fixed-quantity discharge of cosmetics by using elastic materials and integrated components to manage pressure and discharge effectively.
Implementation Method 1
a pumping member (410) made of an elastic material so that a content (1) is discharged through a pumping action due to an elasticity
Implementation Method 2
a decompression support to maintain the undercut part closed during vacuum tests
Data Source
Figure 1
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AI summary
Provided is a case for liquid state cosmetics. The case for liquid state cosmetics includes a case body (100) provided with a content storage part (110) in which the liquid content is stored, a shoulder unit (300) coupled to close an upper portion of the case body (100) and provided with an inflow part (320) having a content inflow hole (321) in a center thereof; a piston unit (200) disposed in the case body (100) to move according to discharge of the content, a pumping unit (400) inserted into the inflow part (320) and connected to the content inflow hole (321) to discharge the content through pumping action due to elasticity, and a button unit (500) elevatably coupled to an upper portion of the shoulder unit (300) and connected to the pumping unit (400) and having an outlet hole (501), through which the content is discharged, at a center thereof, the button unit (500) operating the pumping unit to discharge the content to the outlet hole by the pumping action of the pumping unit (400).