Segmented Scraper Blade Design for Curved Surface Conformance
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Solution Overview
Problem
Existing ice scrapers for vehicles suffer from poor ergonomics, inefficiency in removing material over a wide path, and are prone to damage, with designs that do not easily fit in storage spaces and require excessive hand and wrist strain due to their bulky and non-adaptive nature.
Innovation Solution
A scraper with continuous and discontinuous material removal edges that can conform to curved surfaces, featuring a handle mechanism that distributes force evenly and transforms bending loads into tension and compression, allowing simultaneous contact with the surface and reducing strain on the user.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a scraper is designed with a rigid structure to maintain stability, then structural strength is improved, but the ability to conform to curved surfaces deteriorates
Solution Approach 1:
The scraper blade is divided into multiple independent segments that can flex relative to each other, allowing the blade to conform to curved surfaces while maintaining overall structural integrity through the segmented design
Solution Approach 2:
The scraper incorporates a flexible or adjustable mechanism that allows the blade to dynamically adapt its shape to match curved surfaces, transitioning from a rigid static structure to a dynamic adaptive one
2Productivity
If a scraper uses a wide material removal edge to increase efficiency, then productivity is improved, but the device becomes larger and more difficult to store deteriorates
Solution Approach 1:
The scraper blade can be folded or nested within the handle or body of the device when not in use, allowing a wide blade for efficient material removal to be compacted into a small storable form factor
Solution Approach 2:
The scraper incorporates a collapsible or telescoping mechanism that allows the blade width to be adjusted or reduced for storage, transforming from a permanently wide structure to a dynamic one that can be compacted
3Force
If a scraper is designed with a long handle to provide leverage, then force application is improved, but ergonomics and wrist strain worsen
Solution Approach 1:
The handle is divided into segmented sections that can flex or articulate, allowing the long handle to maintain leverage while accommodating natural hand and wrist positions, reducing strain through the segmented flexible design
Solution Approach 2:
The scraper incorporates an adjustable angle or articulation mechanism in the handle that allows optimization of force application vectors, enabling effective leverage while maintaining ergonomic hand positions by adjusting the angle rather than requiring excessive wrist extension
4Device complexity
If a scraper uses a single continuous material removal edge, then simplicity is improved, but the ability to remove material over wide curved paths deteriorates
Solution Approach 1:
The material removal edge is divided into multiple discrete contact points or segments spaced along the blade, allowing each segment to independently contact the surface and collectively cover a wider curved path while maintaining a relatively simple overall blade structure
Solution Approach 2:
Multiple discrete material removal elements are combined into a single integrated blade assembly, achieving wide path coverage through the combination of multiple contact points while maintaining simplicity through their unified structure
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 scraper effectively removes adhered material from curved surfaces with reduced hand and wrist strain, improved efficiency, and compact design suitable for storage, maintaining stability and effectiveness in removing materials like ice and frost.
Implementation Method 1
a first structure that is coupled to the first material removal wall near the first material removal edge and to one or both of the handle and the second material removal wall forming a first truss, where the first truss variably transforms bending loads applied to the first material removal edge into tension and compression loads in the first truss
Implementation Method 2
The scrapers are constructed such that material removal edges can conform to the curvature of a surface from which material is to be removed, when a user applies a force to push the scraper against the surface
Data Source
AI summary
Scrapers for removing adhered material from surfaces employ continuous and discontinuous material removal edges to remove different types of material. Continuous and sometimes discontinuous material removal edges are constructed and arranged to conform to the curvature of a surface from which material is to be removed, when a user forces the scraper against the surface. Some scrapers include multiple material removal edges designed to simultaneously contact the surface. The use of multiple points of contact combined with locations of handles provide stable designs that reduce hand and wrist strain.