Pencil Sharpener With Integrated Heating Element

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Solution Overview

Problem

Conventional cosmetic pencil sharpeners often result in broken or damaged tips due to the delicate composition of the pencils, and users resort to manual heating to prevent breakage and sanitize the tips, which is inefficient and not integrated into the sharpening process.

Innovation Solution

A pencil sharpener with an integrated heating element that thermally couples to the sharpener assembly to heat the pencil tip during sharpening, and optionally includes a separate heating element for reheating and a sanitation feature using UV LEDs to sterilize the applicator end.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If manual rotation of cosmetic pencil is used for sharpening, then the sharpening process is simple, but the tip is subject to breakage and damage

Engineering Contradiction:

Improvesharpening operationVSAvoidtip integrity

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The patent combines the heating element with the sharpener body, integrating two previously separate functions (heating and sharpening) into a single device. This allows the pencil tip to be heated and sharpened in one operation, preventing breakage while maintaining ease of use.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The heating element pre-heats the cosmetic pencil tip before sharpening occurs. By softening the tip in advance through heating, the subsequent sharpening process becomes safer and less likely to cause breakage, as the material is more pliable.

Inventive Principle:

Principle #10Preliminary action

2Reliability

If users heat the tip using a lighter or external heat source, then tip breakage is prevented, but the process becomes inefficient and requires additional tools

Engineering Contradiction:

Improvetip stabilityVSAvoidsharpening efficiency

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The heating function is merged directly into the sharpener device, eliminating the need for separate heating tools like lighters. This integration improves productivity by allowing users to complete both heating and sharpening in one continuous operation without switching tools.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The device becomes multi-functional by incorporating both heating and sharpening capabilities in one unit. This universal design eliminates the need for multiple separate tools, thereby improving efficiency and productivity while maintaining tip stability.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Productivity

If heating element is integrated into sharpener assembly, then heating and sharpening can be done simultaneously, but device complexity increases

Engineering Contradiction:

Improvesharpening speedVSAvoidsharpener structure

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The heating element is positioned locally at the tip area of the sharpener, focusing thermal energy only where needed. This localized approach allows simultaneous heating and sharpening without requiring complex system-wide heating mechanisms, thus limiting the increase in overall device complexity.

Inventive Principle:

Principle #3Local quality

4Loss of time

If cosmetic pencil tip is sharpened without heating, then the process is faster, but the tip is more prone to breakage and damage

Engineering Contradiction:

Improvesharpening timeVSAvoidtip durability

Core Design Contradiction:

Loss of timeVSReliability

Solution Approach 1:

The heating element performs preliminary softening of the pencil tip before the sharpening blades engage. This pre-heating step takes minimal time but significantly reduces breakage risk, achieving a balance between speed and reliability by preparing the material in advance.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The heating and sharpening processes occur in continuous sequence without interruption. The pencil tip is heated and then immediately sharpened while still warm, maintaining the beneficial softened state throughout the operation. This continuous process minimizes total time while ensuring tip durability.

Inventive Principle:

Principle #20Continuity of useful action

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 integrated heating element prevents tip breakage by stabilizing the cosmetic composition, and the sanitation feature ensures hygiene, providing a more efficient and user-friendly sharpening experience.

Implementation Method 1

a heating element thermally coupled to the sharpener assembly configured to heat tips of a pencil inserted within the pencil sharpener

Methodology Applied

Scientific EffectThermal conduction: Conduction (thermal)

Implementation Method 2

a sanitation element for eliminating bacterial or sterilizing an applicator end or tip of the pencil

Methodology Applied

Scientific EffectUV radiation sterilization: Radiation

Data Source

PatentUS11712919B2Sharpener with heating element

Publication Date: 2023.08.01 GARCIA REGINA M

AI summary

A pencil holder is disclosed. The pencil holder may include a housing having a first receptacle for receiving a distal end of a pencil. The pencil holder also includes a heating element disposed within the housing for heat the distal end of the pencil.