Adjustable Knife Handle Counterweight System for Mass Shift Compensation
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Solution Overview
Problem
Conventional kitchen knives experience a shift in the center of mass due to repeated sharpening, affecting comfort and performance, as they are typically manufactured with a fixed weight distribution.
Innovation Solution
A knife design featuring a handle, blade, and adjustable counterweight unit with a cover seat, counterweight-receiving member, counterweights, and biasing member, allowing for the adjustment of weight distribution by adding or removing counterweights through a radial exit opening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixed weight distribution is used in conventional knives, then the manufacturing process is simple, but the knife performance deteriorates after repeated sharpening due to center of mass shift
Solution Approach 1:
The counterweight system is segmented into multiple individual counterweights that can be independently added or removed from the handle's accommodating space, allowing flexible adjustment of the knife's center of mass without requiring a complex overall mechanism
Solution Approach 2:
The knife handle transitions from a static fixed-weight design to a dynamic adjustable-weight design, where the center of mass can be repositioned by adding or removing counterweights to compensate for material loss during sharpening
2Adaptability or versatility
If counterweights are made removable to adjust weight distribution, then the knife can be rebalanced after sharpening, but the handle structure becomes more complex
Solution Approach 1:
The counterweights are nested within the handle's accommodating space, with each counterweight fitting inside a counterweight-receiving member that is itself disposed within the handle, creating a compact nested structure that minimizes external complexity
Solution Approach 2:
The counterweight system is designed to be extractable from the handle through a cover seat, allowing users to remove and add counterweights without disassembling the entire handle structure, thus maintaining structural integrity while enabling adjustment
3Manufacturing precision
If multiple counterweights are provided for adjustment, then the center of mass can be precisely controlled, but the device complexity increases
Solution Approach 1:
Different counterweights can have different weights and are positioned at different locations within the accommodating space, allowing precise control of the center of mass by selecting specific counterweights and their positions rather than requiring a single complex adjustable mechanism
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 adjustable weight distribution improves the knife's performance and comfort by compensating for the shift in center of mass caused by repeated sharpening, while maintaining a simple and neat structure.
Implementation Method 1
a biasing member disposed in the counterweight-receiving member and biasing the counterweights toward the abutment wall
Data Source
AI summary
A knife includes a blade, and a counterweight unit, and a handle having an accommodating space. The counterweight unit includes a counterweight-receiving member removably disposed in the accommodating space, multiple counterweights, and a biasing member. The counterweight-receiving member has a tubular wall, and an abutment wall cooperating with the tubular wall to define a receiving space and defining an exit opening that spatially communicates with the receiving space. The counterweights are removably disposed in the receiving space. The biasing member biases the counterweights toward the abutment wall so as to permit removal of one of the counterweights via the exit opening when the counterweight unit is separated from the handle.