Heated Mascara Applicator Circuit Layout for Fast Low-Power Heating
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Solution Overview
Problem
Conventional heated mascara applicators face challenges in efficiently heating the product to enhance application performance while maintaining compact size and power efficiency, especially when used with thermally dynamic or slow-setting mascara compositions.
Innovation Solution
A handheld mascara applicator with a printed circuit design and strategically placed discrete heating elements, capable of heating at least 0.15 g of mascara to a product application temperature in 25 seconds or less, using a power supply that provides extended heating service without significant performance decline.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If heating components are added to a separable mascara applicator, then the applicator can heat the mascara product to improve application performance, but the applicator size increases making it less convenient for storage
Solution Approach 1:
The applicator is divided into distinct functional modules: a handle containing the power source and control circuitry, a stem with integrated heating elements, and an applicator head with bristles. This segmentation allows each component to be optimized independently for its specific function while maintaining overall compactness.
Solution Approach 2:
The heating elements are merged directly into the applicator stem and head structure, eliminating the need for separate heating devices. The electronic circuitry is integrated into the handle, combining power source, control, and heating functions in a single unified device that maintains a sleek, compact form factor.
2Productivity
If the applicator heats the mascara quickly, then the product viscosity is reduced for better application, but the power consumption increases
Solution Approach 1:
The heating elements operate in periodic cycles rather than continuously, activating only when needed to heat the mascara product. This periodic operation achieves the required heating speed while significantly reducing overall power consumption compared to continuous heating.
Solution Approach 2:
Heating is applied locally and selectively to only the portions of the applicator that contact the mascara product, rather than heating the entire applicator structure. This localized heating approach minimizes energy consumption while achieving the necessary temperature increase for product application.
3Ease of operation
If the applicator is designed to be compact for easy storage, then portability is improved, but space for electronic circuitry and heating elements is reduced
Solution Approach 1:
The electronic circuitry and power source are nested within the handle structure, with components arranged in a compact, space-efficient configuration. The heating elements are nested within the applicator stem, allowing the overall device to maintain a sleek, compact form factor while accommodating all necessary functional components.
Solution Approach 2:
The electronic components are arranged in a three-dimensional configuration that optimizes space utilization within the handle. Circuit boards are positioned perpendicular to the handle axis, and power source placement is optimized to maximize available space while maintaining a compact external dimensions suitable for portability.
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 precise heat distribution and efficient heating of mascara, improving application performance by reducing viscosity and enhancing characteristics like curl, fullness, and separation, while maintaining a compact and power-efficient design.
Implementation Method 1
a heat generating portion that is effective to heat at least 0.15 g of mascara located on the applicator head, from an ambient temperature to a product application temperature
Data Source
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.