Spirit Bubble Angle Guide for Variable Knife Edge Sharpening
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Solution Overview
Problem
Existing knife sharpening aids fail to maintain a correct sharpening angle during the grinding process, especially for knives with varying edge shapes and widths, and can cause damage to both the aid and the sharpening stone due to friction.
Innovation Solution
A device comprising a spirit bubble and a base, rotatably connected to allow real-time adjustment and maintenance of the sharpening angle, applicable to knives with different widths and edge shapes, ensuring the angle is kept within the correct range during grinding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a U-shaped angle device is used to clamp the spine of the knife, then the sharpening angle can be fixed, but the device generates friction with the sharpening stone causing damage to both the device and the stone
Solution Approach 1:
The patent removes the clamping component that contacted the sharpening stone from the system. Instead of using a U-shaped device that clamps the knife spine and touches the stone, the invention uses a separate angle indicator that only observes the angle without contacting the stone, thereby eliminating the friction problem while maintaining angle fixation capability
Solution Approach 2:
The patent introduces an angle indicator as an intermediary device that mediates between the knife and the sharpening process. The indicator attaches to the knife but does not contact the sharpening stone, serving as a mediator that provides angle information without causing friction damage
2Manufacturing precision
If a static angle gauge is used for reference, then the initial angle can be set, but the sharpening angle cannot be corrected or monitored in real time during grinding
Solution Approach 1:
The patent implements feedback by providing real-time visual indication of the sharpening angle through the angle indicator. The indicator continuously displays the current angle during grinding, allowing the operator to see deviations and make immediate corrections, thereby maintaining reliable angle consistency throughout the sharpening process
Solution Approach 2:
The patent transitions from a static angle gauge to a dynamic angle indicator system that moves with the knife during sharpening. The indicator remains attached to the knife and moves together with it, providing continuous real-time angle monitoring rather than just a fixed initial reference
3Manufacturing precision
If a U-shaped angle device is designed for a specific knife width, then the angle can be fixed, but the device cannot be applied to knives with different widths reducing versatility
Solution Approach 1:
The patent creates a universal angle indicator that can be attached to knives of various widths and shapes. The indicator uses a flexible attachment method (such as adhesive or magnetic attachment to the blade face) rather than fixed clamping, allowing it to adapt to different knife dimensions while maintaining accurate angle indication functionality
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 ensures accurate and continuous sharpening by maintaining the correct angle, preventing offset and damage to the sharpening stone, and is applicable to a wide range of knife types.
Implementation Method 1
a spirit bubble for observing a change of the sharpening angle of the cutting edge and positioning the sharpening angle of the cutting edge
Data Source
AI summary
Provided is a device for observing and positioning a sharpening angle of a cutting edge. The device includes a spirit bubble for observing a change of a sharpening angle of a cutting edge and positioning the sharpening angle of the cutting edge, and a base for fixing the device on a knife body. The spirit bubble is rotatably connected to the base for adjusting an angle between the spirit bubble and the base. The device enables, in a dynamic process of grinding a cutting edge of a knife, a grinder to continuously remain in a correct sharpening angle range and grind the cutting edge in accordance with a correct sharpening angle of the knife when holding the knife to perform a grinding action, and also meets a requirement for controlling sharpening angles of cutting edges of knives with various edge shapes in respective edge grinding processes of the knives.