Sole Structure With Cored-Out Cavities For Ski Boots
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Solution Overview
Problem
Existing sole structures for sports shoes, particularly cross-country and telemark shoes, face challenges in achieving lightweight design while maintaining lateral and torsional stability for skiing and providing adequate traction and slip resistance for walking on various surfaces without skis.
Innovation Solution
The sole structure incorporates cored-out areas in standing projections with open cavities that extend from the standing surface to the connecting surface, utilizing two materials with different hardness levels for improved flexibility and traction, along with strategically designed grooves and covering to enhance walking properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the sole construction uses a large amount of material to ensure durability and traction, then wear resistance and slip resistance improve, but weight increases
Solution Approach 1:
The sole construction uses a two-material system where a hard structural component provides durability and shape retention, while a soft covering material provides traction and slip resistance. This local differentiation of material properties allows each material to perform its optimal function without requiring excessive amounts of either material, thus reducing overall weight while maintaining reliability.
Solution Approach 2:
The invention combines two different materials with complementary properties: a hard structural component (first material) and a soft covering material (second material). This composite structure allows the hard material to provide structural integrity and wear resistance, while the soft material provides grip and traction, achieving high reliability without the weight penalty of using only soft, high-friction material throughout.
2Stability of the object's composition
If the sole construction uses hard material throughout to provide lateral and torsional stability for skiing, then stability improves, but traction and slip resistance on walking surfaces deteriorates
Solution Approach 1:
The sole construction differentiates material properties by location: the hard structural component provides lateral and torsional stability for skiing, while the soft covering material on the standing surface provides traction and slip resistance for walking. This local quality differentiation resolves the contradiction between stability and traction by assigning different material properties to different functional zones.
Solution Approach 2:
The invention uses a composite material system where the hard first material provides structural stability for skiing, and the soft second material provides traction for walking. This composite approach allows the sole to exhibit both rigid stability when skiing and flexible grip when walking, resolving the contradiction between these opposing requirements.
3Reliability
If the sole construction uses soft material to improve traction and slip resistance for walking, then walking comfort improves, but lateral and torsional stability for skiing deteriorates
Solution Approach 1:
The sole construction applies soft covering material only to the standing surface area where traction is needed for walking, while the structural component maintains hardness throughout to provide torsional and lateral stability for skiing. This localized application of soft material resolves the contradiction by providing slip resistance only where needed without compromising overall structural stability.
4Reliability
If the sole construction is designed with complex material layers and structures to meet multiple performance requirements, then performance improves, but manufacturing cost and complexity increases
Solution Approach 1:
The sole construction is segmented into two distinct components: a structural component and a covering. This segmentation allows each component to be manufactured separately using optimized processes for its specific material and function, then assembled together. This reduces manufacturing complexity compared to trying to create a monolithic multi-material structure, while still achieving the required multi-function performance.
Data Source
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AI summary
The invention relates to a sole construction (1) for a sports shoe, more particularly a cross-country ski- or telemark boot, the sole construction (1) extending substantially between a connection face (2) for connection to the sports shoe and a standing face (3) for standing on a surface, a part of the standing face (3) forming a contact face (4) for making contact with a ski or ski binding, the sole construction having: a structural component (5) made of a first material, a section of the surface of the structural component (5) forming the connection face (2); a covering (6) made of a second material, the covering (6) covering the structural component (5) at least partially towards the standing face (3); a connection element (7) for co-operating with a retaining device, more particularly the ski binding; standing projections (9) towards the standing face (3), the standing projections (9) being interrupted by at least one transverse groove (14) from the standing face (3) in the direction of the connection face (2); wherein in a cored-out region (11) of the sole construction (1), depressions (12) are provided in standing projections (9) and extend from the standing face (3) in the direction of the connection face (2) and form cavities (13) open towards the standing face (3).