Magnet Knife Holder with Angle Adjustment for Precision Sharpening
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Solution Overview
Problem
Conventional methods for sharpening double reed knives used for musical instruments, such as oboe reeds, lack precision in controlling the sharpening angle, especially for double hollow ground and bevel knives, leading to variability in knife edge quality and limited ability to use user-preferred sharpening stones.
Innovation Solution
A sharpening apparatus with a magnet assembly for secure knife holding and an angle adjustment mechanism that allows for precise adjustment of the sharpening angle between the knife blade and the sharpening stone, enabling angles as low as 0 degrees, accommodating both double hollow ground and bevel knives, and allowing the use of user-preferred sharpening stones.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If free hand control of sharpening angle is used, then operation simplicity is maintained, but manufacturing precision of knife edge deteriorates
Solution Approach 1:
The patent introduces an intermediary device (the sharpening apparatus with angle-indicating protractor) that mediates between the operator and the sharpening process. The protractor serves as a visual guide that translates the desired sharpening angle into a tangible reference, allowing the operator to achieve precise angles without complex mechanical constraints.
Solution Approach 2:
The patent changes the parameter control approach by providing a visual scale (protractor) that displays angle parameters directly to the operator. This allows the operator to adjust and control the sharpening angle parameter visually, transitioning from purely tactile/free-hand control to visual-parameter-based control, thereby improving precision while maintaining operational simplicity.
2Device complexity
If fixed knife blade holder clamps both sides of knife blade, then device complexity is reduced, but adaptability of sharpening angle deteriorates
Solution Approach 1:
The patent transforms the static, fixed-angle holder into a dynamic system where the knife blade can be positioned at various angles relative to the sharpening stone. The angle-indicating protractor enables dynamic angle adjustment and visualization, allowing the same simple holder structure to accommodate multiple sharpening angles from 0 to 90 degrees.
Solution Approach 2:
The patent segments the sharpening process into discrete angle measurements using the protractor scale. By dividing the angular range into measurable increments, the operator can selectively position the knife at specific angles, effectively creating multiple fixed-angle positions from a single flexible holder configuration.
3Reliability
If magnet assembly securely holds knife, then reliability of knife positioning is improved, but ease of knife attachment deteriorates
Solution Approach 1:
The magnetic attachment system is self-aligning and self-holding. When the knife blade approaches the magnetic holder, the magnetic force automatically guides and secures the blade in position without requiring manual alignment or additional fastening steps. The operator simply needs to bring the blade near the magnet, and the system completes the attachment automatically.
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 apparatus provides precise control over the sharpening angle, ensuring consistent knife edge quality and allowing users to sharpen both sides of double hollow ground and bevel knives on their preferred stones, extending the sharpening angle range to 0-50 degrees, thereby addressing the limitations of existing methods.
Implementation Method 1
a magnet assembly for secure knife holding
Data Source
AI summary
An apparatus and method for its use employ a magnet assembly to securely hold a knife by its blade. Along with a carriage and angle adjustment assembly that set and control the sharpening angle of the knife relative to a sharpening surface, the apparatus provides for sharpening of knives such as double hollow ground reed scraping knives, and bevel reed scraping knives.