Shoe Inner Dimension Measurement via Plasticine Foot Model

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Solution Overview

Problem

Online shoe shopping often results in poorly fitting shoes due to reliance on standard size measurements, making it difficult for consumers to purchase comfortable shoes without trying them on.

Innovation Solution

A method involving a filling material, such as plasticine, is used to accurately measure the inner dimensions of shoes by replicating the shoe's internal space, allowing for precise measurement of key dimensions without damaging the shoe, and a measuring tool with long strip scales for accurate data collection.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If standard shoe sizes are used for online shopping, then purchasing convenience is improved, but measurement precision deteriorates

Engineering Contradiction:
Improvepurchasing convenienceVSAvoidshoe fit accuracy
Core Design Contradiction:
Ease of operationVSMeasurement precision

Solution Approach 1:

The patent creates a physical copy (foot model) of the shoe's internal space by filling it with molding material. This copy preserves the exact three-dimensional dimensions and shape characteristics of the original shoe interior, enabling accurate measurement and comparison without needing to physically try on the shoe.

Inventive Principle:
Principle #26Copying

Solution Approach 2:

The patent performs preliminary measurement actions by creating the foot model before the purchasing decision is made. All critical dimensional data is captured in advance through the molding process, allowing consumers to make informed decisions online without later adjustments or returns.

Inventive Principle:
Principle #10Preliminary action

2Measurement precision

If the shoe is filled tightly with filling material, then measurement precision is improved, but the shoe structure may be damaged

Engineering Contradiction:
Improveinner dimension accuracyVSAvoidshoe structure integrity
Core Design Contradiction:
Measurement precisionVSStrength

Solution Approach 1:

The patent uses a flexible cover material (such as plastic wrap or cling film) to包裹 the filling material. This thin film allows the filling material to be pressed tightly against the shoe's inner surface for accurate molding, while the flexible nature of the cover prevents damage to the shoe structure during the molding process.

Inventive Principle:
Principle #30Flexible shells and thin films

3Measurement precision

If multiple pieces of filling material are used to fill the shoe, then measurement precision is improved, but device complexity increases

Engineering Contradiction:
Improvedimensional accuracyVSAvoidfilling process complexity
Core Design Contradiction:
Measurement precisionVSDevice complexity

Solution Approach 1:

The patent divides the filling material into multiple smaller pieces that can be sequentially inserted and compressed into the shoe. Each piece is molded under the cover material, and they are pressed together to form a complete foot model. This segmentation makes the filling process more manageable and adaptable to different shoe sizes and shapes.

Inventive Principle:
Principle #1Segmentation

4Measurement precision

If the filling material is dried and shaped, then measurement precision is improved, but time consumption increases

Engineering Contradiction:
Improveshape stabilityVSAvoiddrying time
Core Design Contradiction:
Measurement precisionVSLoss of time

Solution Approach 1:

The patent utilizes the physical parameter change of the filling material from a soft, moldable state to a hardened, stable state through drying. This transformation allows the material to retain the precise three-dimensional shape of the shoe's internal space, enabling accurate measurement while maintaining operational simplicity.

Inventive Principle:
Principle #35Parameter changes

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

This method and tool enable consumers to select fitted shoes accurately and efficiently, reducing measurement errors and improving purchasing convenience and accuracy.

Implementation Method 1

A method involving a filling material, such as plasticine, is used to accurately measure the inner dimensions of shoes by replicating the shoe's internal space

Methodology Applied
Scientific EffectPlasticity: Plasticity

Implementation Method 2

The cover material being a breathable, thin, and elastic membraneous or mesh material

Methodology Applied
Scientific EffectElasticity: Elasticity

Data Source

PatentUS9700104B2Method for measuring inside dimensions of shoes and measuring tool therefor
Publication Date: 2017.07.11 DONG XIN
  • US9700104B2 patent drawing
  • US9700104B2 patent drawing

AI summary

Disclosed is a method for measuring inside dimensions of shoes. In this method a foot model can be obtained after the processes of a plastic filling material being filled into the shoe, shaping, being taken out from the shoe and being restored; then more accurate data of the inside dimensions of the shoe can be obtained by measuring the foot model. Further disclosed is a measuring tool able to be used in the present measuring method. By using the measuring method and the measuring tool, errors encountered when going shopping for shoes can be reduced to the maximum degree by a simple operation, such that the problem that an ordinary consumer could buy a pair of perfect fitting shoes only if he/she tries them personally can be solved.