Heated Mascara Applicator with Segmented Resistive Heating
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Solution Overview
Problem
Conventional heated mascara applicators that are separable from the product container face challenges in compact design due to the need for electronic circuitry, leading to increased size and complexity, while integral applicators do not face the same space constraints, making it difficult to create a portable and efficient heated applicator for mascara application.
Innovation Solution
A handheld mascara applicator with a printed circuit board that supports discrete resistive heating elements and a molded brush head, allowing for precise heat distribution and efficient heating of the product, enabling rapid temperature increase and extended heating performance without significant size or power source changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If electronic circuitry is housed within a separable applicator, then heating function is achieved, but applicator size increases
Solution Approach 1:
The applicator is divided into two separate components: a reusable handle containing the electronic circuitry and heating element, and a replaceable applicator head containing only the bristles. This segmentation allows the heating function to be concentrated in a compact handle while the applicator head remains small and simple for easy storage and replacement.
Solution Approach 2:
The handle is designed as a universal base that can accommodate multiple types of applicator heads through a standardized connection interface. This allows a single handle to serve multiple functions with different brush configurations, reducing the need for multiple complete applicator units and thereby reducing overall storage volume.
2Temperature
If electronic circuitry is added to separable applicator, then heating performance is improved, but device complexity increases
Solution Approach 1:
By separating the electronic circuitry into its own dedicated handle unit, the complexity is isolated to a single component. The applicator head becomes a simple mechanical element without electronics, making it easier to manufacture and replace. This segmentation of complexity allows the heating function to be implemented without making the entire applicator system overly complex.
Solution Approach 2:
The applicator head is designed as a disposable or easily replaceable component without electronic circuitry, while the expensive electronic handle is a durable long-lasting unit. This differentiation allows consumers to replace only the simple brush head when needed, rather than dealing with a complex electronic unit as a whole, effectively managing device complexity.
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 enables rapid heating of mascara to enhance application characteristics such as viscosity reduction and performance improvement, maintaining effective heating for a full-size container without recharging, while maintaining a compact and aesthetically acceptable design.
Implementation Method 1
the heat generating portion comprises a plurality of discrete, fixed value resistive heating elements
Data Source
Figure 1
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Figure 4~5B
AI summary
A handheld mascara applicator comprising an applicator head, a source of electric current, and a heat generating portion that is effective to heat a quantity of mascara located on the applicator head, from an ambient temperature to a product application temperature, in 25 seconds or less, or that is effective to raise the temperature of the outer surface of the applicator head from an ambient temperature to about 55°C or more, in 25 seconds or less. Systems for applying various types of mascara compositions are also disclosed.