Hand Tool Polyolefin Protection Layer for Vibration and Shock Absorption
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Solution Overview
Problem
Conventional hand tools suffer from issues such as soreness and injury due to shake transmission, slipping, corrosion, looseness of locking parts, and the risk of electric shock, along with environmental pollution from electroplating processes.
Innovation Solution
A hand tool design featuring a shaft with adaptable affecting portions and a Polyolefin protection layer that provides elastic coverage, interlaced embossments for friction, and insulation, reducing shake transmission, slipping, and corrosion, while eliminating the need for electroplating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If direct touch of hard parts is used for force application, then ease of operation is maintained, but hand injury and soreness occur due to shake transmission
Solution Approach 1:
The patent introduces a protection layer made of elastic material as an intermediary between the user's hand and the hard tool surface. This layer absorbs shake and reaction forces, preventing direct transmission to the hand while maintaining grip effectiveness, thus resolving the contradiction between ease of operation and hand injury prevention
Solution Approach 2:
The protection layer is designed as a flexible thin film that conforms to the tool's surface geometry. This flexible covering provides cushioning against shake and impact while allowing the user to maintain firm grip, addressing both operational ease and injury prevention
2Adaptability or versatility
If irregular shapes with endpoints and protrusions are used for diverse part gripping, then adaptability is improved, but locking parts loosen and parts wear easily due to repeated force application
Solution Approach 1:
The protection layer acts as a flexible shell that covers and protects the locking parts and irregular surface features. It distributes applied forces more evenly, preventing concentrated stress that would cause loosening of locking parts and wear of protrusions, while maintaining the adaptability of the irregular shape for gripping diverse parts
Solution Approach 2:
The protection layer provides beforehand cushioning to the locking parts and surface features before force is applied during operation. This pre-protection prevents damage from repeated use, maintaining locking part integrity and preventing wear of critical features
3Reliability
If electroplating is used for corrosion prevention, then reliability is improved, but environmental pollution and energy consumption increase
Solution Approach 1:
The patent extracts the corrosion protection function from the electroplating process and implements it through a separate protection layer. This eliminates the need for harmful electroplating chemicals and sewage treatment while maintaining corrosion resistance, thus resolving the contradiction between reliability and environmental pollution
Solution Approach 2:
The protection layer can be made from cost-effective materials and applied as a disposable or easily replaceable covering. This alternative to permanent electroplating achieves corrosion protection without the environmental burden of heavy metal sewage, addressing both reliability and environmental concerns
4Strength
If metal materials are used for hand tool construction, then strength is improved, but electric shock risk increases due to electrical conduction
Solution Approach 1:
The protection layer serves as an electrical intermediary between the conductive metal tool and the user's hand. This non-conductive layer blocks electrical current transmission while allowing mechanical force transmission, thus maintaining structural strength benefits of metal while eliminating electric shock risk
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 solution effectively absorbs shake, prevents slipping and corrosion, maintains locking part integrity, and reduces the risk of electric shock, all while minimizing environmental impact and energy consumption.
Implementation Method 1
The material of the protection layer is soft and insulated. When it is settled and/or covered on the surface of the shaft, shake and reaction can be absorbed by the protection layer during the employment of the hand tool.
Implementation Method 2
The exterior of the protection layer has a design. The design is formed by a plurality of interlaced embossment and depression. The surface of the plurality of embossment and depression are different extents of roughness.
Implementation Method 3
The material of the protection layer is soft and insulated. When it is settled and/or covered on the surface of the shaft, shake and reaction can be absorbed by the protection layer during the employment of the hand tool.
Data Source
AI summary
A hand tool includes a shaft, at least one affecting portion, and a protection layer. The shaft is like a bar, and can be hold by a hand. The affecting portion connects with the shaft. The affecting portion can grip a specific part which a user wants to control. The protection layer is settled and/or covered on at least one portion of the hand tool surface. The protection layer is lumpy and rough. Because of the protection layer, the hand tool is shake-proof, wear-proof, slip-resistance, and electric insulation.