Replaceable Blade Skinning Knife With Spring Retention
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Solution Overview
Problem
Skinning an animal after a kill is a tedious and energy-consuming task due to the abrasive nature of the fascia that quickly wears down knife blades, requiring frequent sharpening.
Innovation Solution
A skinning knife design featuring a replaceable blade secured to a blade carrier with a spring mechanism and slot configuration, allowing for easy blade replacement and secure attachment, reducing the need for continuous sharpening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a traditional fixed blade knife is used for skinning, then the knife structure is simple and easy to manufacture, but the blade wears down quickly due to abrasive fascia requiring frequent sharpening
Solution Approach 1:
The knife is divided into separate components: a handle, a blade carrier, and a replaceable blade. The blade can be easily removed and replaced when worn, eliminating the need for frequent sharpening while maintaining a simple overall structure. The blade carrier includes a mount with a mounting surface and a boss that works with the blade's slot configuration for secure attachment.
Solution Approach 2:
The blade is designed as a disposable or replaceable component that can be discarded when worn and replaced with a fresh blade. This allows the user to focus on skinning rather than sharpening, as each blade is used until worn and then replaced without requiring skill or time for sharpening.
2Productivity
If a replaceable blade system is implemented, then blade replacement is easy and sharpening frequency is reduced, but the device complexity increases with additional components like spring and slot mechanism
Solution Approach 1:
The blade carrier is segmented into distinct functional elements: a mount with mounting surface for attachment to the handle, a boss for blade engagement, a spring for retention force, and a slot for blade insertion. This segmentation allows each component to perform its specific function while keeping the overall design relatively simple and manufacturable.
Solution Approach 2:
The spring mechanism provides automatic retention of the blade in the mounted position without requiring additional fasteners or complex locking mechanisms. The blade's slot configuration works with the boss and spring to create a self-retaining system that secures the blade through elastic force rather than mechanical fastening.
3Strength
If the blade is securely attached to ensure durability, then the knife can withstand skinning forces, but the blade replacement process becomes more complex and time-consuming
Solution Approach 1:
The blade attachment system uses a dynamic spring mechanism that provides continuous retention force while allowing easy release. The spring can be compressed to release the blade and automatically returns to its original position to secure the blade, creating a quick-action retention system that is both strong and easy to operate.
Solution Approach 2:
The blade is pre-positioned in the slot with the appropriate orientation before final attachment. The slot's narrow portion aligns with the blade's front end and the wide portion with the rear end, ensuring correct positioning is achieved automatically during the attachment process without requiring alignment procedures or complex positioning mechanisms.
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 design allows hunters to focus on skinning without the burden of sharpening the blade, extending the knife's usability and reducing fatigue.
Implementation Method 1
a spring including a front portion, a middle portion, and a rear portion, the front portion secured to the mount proximate a front end of the spring. The middle portion is bent outward from the front portion and the rear portion, and the rear portion includes a free end of the spring movable relative to the mount
Data Source
AI summary
A skinning knife includes a handle and a blade carrier coupled to the handle, the blade carrier including a mount having a mounting surface, a boss extending outward from the mounting surface, and a spring including a front portion, a middle portion, and a rear portion. The skinning knife also includes a blade including a sharpened edge, a body, and a slot formed through the body, where the slot extends in a longitudinal direction from a front end to a rear end and includes a narrow portion of a first width and a wide portion of a second width greater than the first width. The blade is releaseably secured to the blade carrier by interaction between the boss and the spring of the blade carrier and the slot of the blade.