3D Shoe Sole Shock Absorber for Stable Compression Load
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Solution Overview
Problem
Conventional shock absorbers made of elastic materials, such as those based on the Schwartz P structure, exhibit a rapid decrease in load when compressively deformed, which is not ideal for general use, potentially impairing wearing comfort when applied to shoe soles.
Innovation Solution
The shock absorber features a three-dimensional structure body with a shape in the unloaded state that follows the change from a regular hexahedron to a trapezoidal space, providing a gradual increase in load during compression, thus enhancing stability and comfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a shock absorber is made from an elastic material thickened based on the Schwartz P structure, then the shock absorber can provide shock absorbing function, but the load rapidly decreases when compressive displacement reaches a certain value, which is not preferable for general use and may impair wearing comfort
Solution Approach 1:
The patent applies asymmetry by changing the shape of the unit structure body from a regular hexahedron to an asymmetric configuration where opposite side surfaces have different areas. This asymmetric geometry modifies the stress distribution during compression, preventing the rapid load decrease that occurs with symmetric structures like the Schwartz P structure, thereby maintaining wearing comfort while preserving shock absorbing function.
Solution Approach 2:
The patent changes the geometric parameters of the unit structure body, specifically modifying the shape so that opposite side surfaces have different areas. This parameter change transforms the mechanical response of the shock absorber under compression, ensuring gradual load increase rather than rapid decrease, thus resolving the contradiction between shock absorbing reliability and wearing comfort.
2Stability of the object's composition
If the shape of the unit structure body is changed to follow the shape change into a trapezoidal space, then the load gradually increases during compression providing stable displacement, but the structural complexity increases
Solution Approach 1:
The patent segments the shock absorber into multiple unit structure bodies arranged in a matrix pattern. Each unit structure body is an independent element with modified geometry (opposite side surfaces having different areas). This segmentation allows the complex stable displacement behavior to be achieved through simple, repetitive unit cells, reducing overall structural complexity while maintaining stability.
Solution Approach 2:
The patent transitions from considering simple one-dimensional compression to a three-dimensional geometric configuration where opposite side surfaces have different areas. This dimensional approach allows the structure to achieve stable displacement characteristics through its 3D geometry rather than complex mechanisms, effectively managing structural complexity.
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 configuration results in excellent shock absorbing performance, ensuring stable displacement under increasing external loads, which translates to improved wearing comfort when integrated into shoe soles.
Implementation Method 1
the shock absorber made of an elastic material thickened based on a Schwartz P structure... has a property that a load rapidly decreases at a time point when compressive displacement reaches a certain value
Data Source
AI summary
A shock absorber includes a shock absorbing portion having a three-dimensional shape formed by a wall in which an outer shape is defined by a pair of parallel curved surfaces. The shock absorbing portion includes at least one three-dimensional structure body obtained by changing a shape of a unit structure body thickened based on a unit structure of a Schwartz P structure. The shape of the three-dimensional structure body in an unloaded state is a shape obtained by changing the shape of the unit structure so as to follow the shape change of the unit structure body, which is the regular hexahedron shaped space occupied by the unit structure body, into the trapezoidal space.