Rotating Leg Knife Sharpener for Stability
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Solution Overview
Problem
Existing portable knife sharpeners lack stability, posing safety risks and inefficiencies due to their inability to maintain a precise sharpening angle, leading to ineffective sharpening and potential user injury.
Innovation Solution
A compact, hand-held knife sharpening device with a rotating leg that increases stability by engaging a flat surface and featuring both coarse and fine sharpening members positioned at an optimal angle, allowing for safe and efficient sharpening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If a handheld knife sharpener is made portable and compact, then mobility and portability are improved, but stability and safety deteriorate
Solution Approach 1:
The patent applies the dynamics principle by incorporating a rotatable leg that can transition between a retracted position (for portability) and an extended position (for stability). The leg rotates about a pivot point and can be positioned at different angles, allowing the device to adapt its stability characteristics based on whether it is being transported or used. This dynamic adjustment resolves the contradiction between compactness and stability.
2Weight of moving object
If the sharpening device is made lightweight and portable, then ease of carrying is improved, but support and alignment capability worsen
Solution Approach 1:
The patent applies the dimensionality change principle by extending the device's support into a third dimension through the rotatable leg. Instead of relying solely on the handheld portion for support, the leg provides additional support points that create a stable triangular base when extended. This dimensional extension allows the lightweight device to achieve proper alignment and stability during use without compromising portability.
3Measurement precision
If the sharpening members are positioned at a precise fixed angle, then sharpening precision is improved, but device complexity increases
Solution Approach 1:
The patent applies the preliminary action principle by pre-setting the sharpening members at the correct angle during manufacturing. The crossed abrasive rods are positioned at the optimal crossing angle (typically 20-30 degrees) and fixed in place, so that when the user simply inserts the knife and pulls it through, the precise sharpening angle is automatically provided. This eliminates the need for the user to perform complex angle adjustments, maintaining precision while minimizing operational 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
The device provides a stable and safe sharpening experience, ensuring precise edge alignment and efficient sharpening of knives, with enhanced safety features preventing user injury and improving sharpening effectiveness.
Implementation Method 1
The sharpening member may be a pair of spaced abrasive sharpening components that selectively engage each side of a knife blade edge
Data Source
AI summary
A handheld, portable knife sharpening device is provided. The knife sharpening device includes a body that accommodates at least one knife sharpening member. The body is interconnected to a rotatable leg that is used to selectively alter the lateral footprint of the device to make knife sharpening safer and more effective.