Convex Knife Sharpener Discs for Adjustable Blade Angle
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing knife sharpeners are unable to adjust the sharpening angle according to the thickness of the knife blade, resulting in inconsistent sharpening performance across different knives.
Innovation Solution
The knife sharpener features convex sharpening surfaces that widen radially, allowing the sharpening angle to be adjusted based on the depth of the knife blade within the sharpening slot, with the angle between the knife guide slot and sharpening slot being adjustable to accommodate various knife thicknesses and types.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the sharpening slot has a fixed V-shape with constant angle, then the structure is simple and easy to manufacture, but the sharpening angle cannot be adjusted for different knife thicknesses
Solution Approach 1:
The sharpening surfaces of the sharpening discs are designed with convex curvature instead of flat or V-shaped surfaces. This convex shape allows the sharpening angle to vary continuously along the radial direction, enabling adaptation to different knife blade thicknesses while maintaining a relatively simple disc structure.
Solution Approach 2:
Different regions of the convex sharpening surface provide different sharpening angles. The convex shape creates local variations in the sharpening angle along the radial direction, allowing the same sharpening disc to accommodate multiple knife thicknesses by utilizing different portions of the convex surface.
2Adaptability or versatility
If the sharpening slot widens radially outwards with convex surfaces, then the sharpening angle can be adjusted for different knife thicknesses, but the manufacturing precision required for the convex surfaces increases
Solution Approach 1:
The convex sharpening surfaces serve multiple functions: they provide adjustable sharpening angles for different knife thicknesses, guide the knife blade through the sharpening slot, and maintain consistent contact between the knife edge and sharpening surface. This multi-functionality reduces the need for additional adjustment mechanisms.
Solution Approach 2:
The convex shape of the sharpening surfaces automatically adapts to different knife blade thicknesses without requiring manual adjustment. As the knife blade is inserted to different depths, the convex surface naturally provides the appropriate sharpening angle, making the system self-adjusting.
3Manufacturing precision
If the knife guide slot runs at an angle to the sharpening slot, then transverse cutting can be achieved for fine sharpness, but longitudinal cutting capability is reduced
Solution Approach 1:
The system allows dynamic selection between transverse and longitudinal cutting modes. The knife guide slot is positioned at an angle to enable transverse cutting for fine sharpness, while the convex sharpening surfaces and adjustable knife insertion depth provide the flexibility to perform longitudinal cutting when needed, making the sharpening process adaptable to different requirements.
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 design enables precise control over the sharpening angle, allowing for optimal sharpening of knives of different thicknesses and types, providing a range of sharpening options from coarse to fine cuts.
Implementation Method 1
the sharpening discs are set in rotary motion and generate a substantially transverse cut
Data Source
Figure 1~4
AI summary
The sharpener (1) has sharpening disks (2, 3) rotatably supported around a rotational axis (8) and comprising sharpening surfaces (11, 12) that are arranged opposite to each other. A sharpening slot (13) is formed between the surfaces in a radially outwardly extending manner, where the surfaces are designed in mirror-symmetrical to each other. A housing encloses the disks and comprises a blade guiding slot that runs at an angle to the sharpening slot. One of the surfaces is designed in convex form i.e. polygonal line, and another surface is convexly or linearly designed.