Insulated Jigsaw Frame and Handle for Shock-Safe Ergonomics
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing power tools, such as jigsaws, do not adequately address user comfort and safety, particularly in preventing electrical shock when cutting electrical wires and maintaining ergonomic design for extended use.
Innovation Solution
A jigsaw design featuring a non-conductive housing and handle made of plastic materials with strategically positioned activation switches and ergonomic gripping surfaces, including recessed portions and raised lips, to prevent electrical shock and reduce user fatigue.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the housing and handle are made of conductive material for structural strength, then the structural integrity is improved, but the risk of electrical shock increases
Solution Approach 1:
The patent changes the electrical conductivity parameter of the housing and handle materials from conductive to non-conductive. The housing is made of non-conductive material and the handle is made of electrically insulating material, fundamentally altering the electrical properties while maintaining structural integrity through appropriate material selection and design.
Solution Approach 2:
The patent employs composite material construction where the housing combines non-conductive structural material with integrated non-conductive components, and the handle uses layered composite structure with electrically insulating material outer layer and internal reinforcement, achieving both strength and electrical insulation properties.
2Object-affected harmful factors
If the housing and handle are made of non-conductive material to prevent electrical shock, then safety is improved, but the heat dissipation capability deteriorates
Solution Approach 1:
The patent segments the thermal management function from the electrical insulation function. The housing and handle provide electrical insulation, while separate dedicated heat dissipation structures (heat sinks, ventilation channels, fins) handle thermal dissipation, allowing each system to optimize its specific function without compromising the other.
Solution Approach 2:
The patent introduces intermediary thermal management components between the motor and the external environment. Heat sinks and ventilation systems act as intermediaries that transfer heat away from the motor and internal components without requiring the housing or handle materials to be thermally conductive, thus preserving electrical insulation while enabling heat dissipation.
3Ease of manufacture
If the handle design is simplified for ease of manufacture, then manufacturing cost is reduced, but the ergonomic comfort for extended use deteriorates
Solution Approach 1:
The patent applies local quality differentiation in the handle design where different regions have different properties optimized for their specific functions. The outer surface features ergonomic contours, grips, and textures for comfort, while the internal structure uses simpler geometric forms for manufacturing ease. This allows complex ergonomic features to be applied only where needed rather than throughout the entire handle.
Solution Approach 2:
The patent employs asymmetric handle design with non-uniform contours, varying grip diameters, and strategically positioned features that conform to the natural hand shape and grip patterns. This asymmetric form provides superior ergonomic comfort while can be manufactured using standard injection molding techniques, balancing comfort requirements with manufacturing simplicity.
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 enhances user safety by preventing electrical shock and improves comfort through ergonomic handling and reduced heat conduction, allowing for extended use without discomfort.
Implementation Method 1
The frame is composed of a non-electrically conductive material
Implementation Method 2
The frame is composed of a non-electrically conductive material... reduced heat conduction
Data Source
AI summary
A power tool includes a housing and a handle coupled to the housing. The handle is configured to be gripped by an operator to manipulate the power tool. The power tool also includes a drive system supported in one of the housing or the handle. The drive system includes a frame, a motor at least partially supported by the frame, and a transmission driven by the motor. The transmission is at least partially supported by the frame. The frame is composed of a non-electrically conductive material.