Insulated Metal Mascara Brush Heating Core

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Solution Overview

Problem

Existing metal mascara brushes with heating cores are prone to short-circuits due to direct contact between the heating core and the metal shell, which compromises their heating functionality and reliability.

Innovation Solution

A metal mascara brush design featuring a heating core with insulated portions, where a first heating portion and a second heating portion are insulated from each other and the metal brush head using first and second insulation tubes, respectively, to prevent short-circuits and ensure reliable heating.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Temperature

If a metal brush head with heating core is used, then heating function is achieved for quick shaping, but short-circuit occurs due to direct contact between heating core and metal shell

Engineering Contradiction:

Improveheating temperatureVSAvoidshort-circuit risk

Core Design Contradiction:

TemperatureVSReliability

Solution Approach 1:

An insulation layer is introduced as an intermediary between the heating core and the metal brush head shell. This insulation layer prevents direct contact between the conductive heating core and the conductive metal shell, thereby eliminating the short-circuit risk while preserving the heating function. The insulation layer acts as a mediator that allows the heating function to operate reliably without causing electrical faults.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Device complexity

If heating core is placed in direct contact with metal shell, then structural simplicity is maintained, but heating reliability deteriorates due to short-circuit

Engineering Contradiction:

Improvebrush head structureVSAvoidheating function reliability

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The insulation layer serves as a simple intermediary component that is integrated into the brush head structure. It prevents short-circuits between the heating core and metal shell while maintaining the overall structural simplicity of the brush head. The insulation layer can be implemented as a coating, lining, or integrated structural feature that does not significantly complicate the design.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Reliability

If insulation measures are added to prevent short-circuit, then reliability is improved, but device complexity increases

Engineering Contradiction:

Improveshort-circuit preventionVSAvoidinsulation structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

A thin film insulation layer is applied to the metal brush head shell or heating core surface. This thin film provides effective electrical insulation to prevent short-circuits while adding minimal structural complexity. The flexible thin film can conform to the contours of the brush head components and is easily integrated into the existing design without requiring complex insulation structures.

Inventive Principle:

Principle #30Flexible shells and thin films

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 insulated heating core design allows for effective and reliable heating of the mascara, preventing short-circuits and enhancing the mascara brush's performance in quickly shaping eyelashes.

Implementation Method 1

the heating core comprises a heating wire which is bent and formed with a first heating portion for heating and a second heating portion for heating

Methodology Applied

Scientific EffectJoule heating: Joule Heating

Implementation Method 2

the first heating portion is sleeved with a first insulation tube for preventing the first heating portion from contacting with the second heating portion and short-circuiting; and the second heating portion is sleeved with a second insulation tube for preventing the second heating portion from contacting with the metal brush head and and short-circuiting

Methodology Applied

Scientific EffectThermal insulation: Thermal Insulation

Data Source

PatentUS20250134238A1Metal mascara brush with effects of heating and quickly shaping, and mascara

Publication Date: 2025.05.01 SHENZHEN KAISHENGDE IND CO LTD

AI summary

A metal mascara brush comprises a main body of the mascara brush, a metal brush head and a heating core, wherein the metal brush head is fixedly disposed on the main body of the mascara brush; the heating core is disposed in the metal brush head; the heating core comprises a heating wire which is bent and formed with a first heating portion for heating and a second heating portion for heating; the first heating portion is sleeved with a first insulation tube; and the second heating portion is sleeved with a second insulation tube. In the present invention, the first heating portion and the second heating portion are cooperatively provided so as to generate heat together. Based on the function of the first insulation tube, it prevents the first heating portion from contacting with the second heating portion to cause a short circuit.