Modular Shoe Last with Detachable Plate Parts
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Solution Overview
Problem
The existing methods for manufacturing custom shoe lasts are time-consuming and often difficult to remove from the shoe upper after forming, due to variations in foot shape among wearers.
Innovation Solution
A shoe last design featuring a base part with a mounting unit for additional plate-shaped parts, arranged in a multi-layered fashion, allowing for easy assembly and detachment, and including a first and second forming surface to accommodate both common and tailor-made regions of the foot, enabling easy formation and removal from the shoe upper.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a custom-made last is manufactured to form a forming surface according to the shape of a wearer's foot, then the fit and comfort of the shoe is improved, but the manufacturing time increases significantly
Solution Approach 1:
The last is divided into a base part and multiple additional parts that can be selectively assembled. The base part contains common geometric features that fit most feet, while additional parts provide customizable adjustments for individual foot shape variations, eliminating the need to manufacture entirely custom lasts for each wearer.
Solution Approach 2:
The base part is designed with universal geometric features that can accommodate the common characteristics of most feet. By combining this universal base with selectable additional parts, the system achieves multi-functionality, serving both standard and customized fitting requirements with a single modular platform.
2Manufacturing precision
If a last is designed to form a precise forming surface according to foot shape, then the shaping accuracy is improved, but the difficulty of removing the last from the wearing opening increases
Solution Approach 1:
The last is segmented into a base part and additional parts that can be separated. After the upper is formed with high precision by the complete last assembly, the additional parts are removed, allowing the base part to be easily extracted from the wearing opening without damaging the formed upper.
Solution Approach 2:
The additional parts are extracted from the last assembly after forming the upper. This extraction allows the remaining base part to be removed from the wearing opening more easily, as the additional parts that might cause interference are taken out first.
Data Source
AI summary
A last includes a base part including a bottom and a plurality of additional parts, each of which is formed in a plate shape and is capable of being assembled to the base part. The base part includes a mounting unit and a first forming surface. The plurality of additional parts include a second forming surface. Each additional part has an end face. The second forming surface includes the end face of each of the plurality of additional parts. The base part includes a first base member including a mounting unit and a second base member attachable to and detachable from the first base member.