Cosmetic Applicator Stem Stamped Joints for Flexible Assembly
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Solution Overview
Problem
Existing applicators for cosmetics and skin care products face challenges in manufacturing stems with desired deformability characteristics without using costly molds and in easily attaching the applicator member to a flexible stem, which can bend easily, complicating assembly.
Innovation Solution
The use of stamped portions on the stem, which are deformed post-molding to create joints that allow for desired flexibility and reduce thickness, enabling the creation of various stem shapes without specific molds and facilitating easier attachment of the applicator member, while maintaining deformation throughout the applicator's lifetime.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a flexible stem is used to improve comfort and accuracy of application, then the applicator member can be positioned more accurately, but the stem bends easily making assembly more difficult
Solution Approach 1:
The stem is pre-formed with a memory shape that allows it to be inserted into the handle in a straight configuration, then automatically returns to its original curved shape after insertion. This preliminary straightening action simplifies assembly while maintaining the desired flexible positioning capability during use.
2Adaptability or versatility
If the stem is made more flexible to improve comfort, then the applicator adapts better to different surfaces, but it becomes more difficult to maintain deformation characteristics throughout the product lifetime
Solution Approach 1:
The stem's physical parameters are changed by treating it with heat or chemical agents that modify the polymer structure, creating a permanent memory shape. This parameter change allows the stem to reliably return to its original configuration after deformation, maintaining consistent deformation characteristics throughout the product lifetime while still providing adaptability during use.
3Adaptability or versatility
If different stem lengths and flexibilities are created to meet various application needs, then the applicator becomes more versatile, but multiple molds are required increasing manufacturing costs
Solution Approach 1:
A single mold produces stems with universal adaptability through memory shape treatment. The same basic stem design can be thermally or chemically treated to create different memory shapes and flexibility characteristics, allowing one mold to produce multiple variations suitable for different applications without requiring separate molds for each variant.
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
This approach allows for the production of applicators that are more comfortable, accurate, and flexible in use, with reduced manufacturing costs and simplified assembly, enabling a wide range of stem designs and improved application techniques.
Implementation Method 1
The material of the stem may creep under the pressure of the die
Data Source
AI summary
An applicator for applying a cosmetic or a skin care product may include a stem including at least one stamped portion forming a joint, and an applicator member disposed at a first end of the stem.