Leg Warmer with Stretchable Binder to Prevent Slipping and Overheating

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Solution Overview

Problem

Existing wearable leg warmers fail to effectively retain body heat in the legs and feet, leading to discomfort and disrupted sleep due to overheating or coldness, and electric heating devices are costly, risky, and unsuitable for prolonged use.

Innovation Solution

A wearable leg warmer made of soft clothing fabric with elasticized openings and a stretchable binder, allowing easy insertion and withdrawal of legs, providing warmth and comfort throughout the body.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Temperature

If socks are worn to retain body heat, then foot warmth is improved, but overheating occurs leading to sleep interruptions

Engineering Contradiction:

Improvefoot warmthVSAvoidsleep continuity

Core Design Contradiction:

TemperatureVSEase of operation

Solution Approach 1:

The leg warmer is designed to cover only the lower leg and foot area, providing localized warmth where heat loss occurs most, while leaving the upper leg and body exposed to maintain overall thermal balance and prevent overheating

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The leg warmer is divided into distinct sections including an ankle portion, lower leg portion, and foot portion, allowing differential thermal management in different anatomical regions with varying heat loss characteristics

Inventive Principle:

Principle #1Segmentation

2Temperature

If electric heating devices are used to warm lower legs, then warmth is improved, but cost and safety risks increase

Engineering Contradiction:

Improvelower leg warmthVSAvoidsafety and cost

Core Design Contradiction:

TemperatureVSReliability

Solution Approach 1:

The leg warmer utilizes the body's own heat through the greenhouse effect, where the fabric structure traps and recycles body heat rather than requiring external power sources, making the system self-sustaining and safe for overnight use

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The patent replaces electric heating mechanisms with a passive thermal management system based on the greenhouse effect, eliminating the need for power consumption, control electronics, and safety mechanisms while maintaining warmth

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Temperature

If conventional leg warmers are used to retain body heat, then warmth is improved, but overheating occurs disrupting sleep

Engineering Contradiction:

Improvebody heat retentionVSAvoidoverheating

Core Design Contradiction:

TemperatureVSObject-affected harmful factors

Solution Approach 1:

The fabric incorporates phase change materials or utilizes the greenhouse effect to regulate temperature transitions, allowing the leg warmer to maintain optimal temperature ranges and release heat when body temperature rises to prevent overheating

Inventive Principle:

Principle #36Phase transitions

4Temperature

If tight-fitting leg warmers are used to retain heat, then warmth is improved, but comfort and ease of removal deteriorate

Engineering Contradiction:

Improveheat retentionVSAvoidease of removal

Core Design Contradiction:

TemperatureVSEase of operation

Solution Approach 1:

The leg warmer incorporates elastic materials and stretchable fabrics that dynamically adjust to leg movement and shape, providing secure fit for heat retention while allowing easy stretching and removal when needed

Inventive Principle:

Principle #15Dynamics

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 wearable leg warmer maintains body heat and induces natural sleep by ensuring warmth and comfort, preventing slipping, and allowing easy removal, thus addressing the issues of conventional leg warmers.

Implementation Method 1

The soft clothing fabric for the wearable leg warmer provides maximum comfort level to a user during prolonged exposure to the wearable leg warmer

Methodology Applied

Scientific EffectThermal insulation: Thermal Insulation

Implementation Method 2

The stretchable binder is positioned and enclosed at the vicinity of the lateral opening of the pouch

Methodology Applied

Scientific EffectElasticity: Elasticity

Data Source

PatentUS12453386B2Wearable leg warmer

Publication Date: 2025.10.28 OLEARY CORINNE EMILY

AI summary

A wearable leg warmer that includes a soft clothing fabric, a sewing thread, and a stretchable binder is disclosed. Longitudinal edges of the soft clothing fabric are folded laterally and stitched utilizing the sewing thread to form a pouch with a lateral opening. The stretchable binder is enclosed at the vicinity of the lateral opening to prevent slipping of the wearable leg warmer. The sewing thread is utilized to stitch in the middle of the pouch to enable division of the lateral opening into two lateral opening portions and enable insertion and withdrawal of legs of the user with minimal human effort, thus retaining body heat of the user and warming feet of the user. The wearable leg warmer provides maximum comfort level to a user during prolonged exposure to induce sleep naturally.