Protective Device for Hand-Held Grinding Tool
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Solution Overview
Problem
Hand-held power tools, particularly grinding tools, face challenges in providing effective collision protection and ergonomic design, leading to operator discomfort and safety issues due to blinding from light sources and inadequate ergonomic features.
Innovation Solution
A protective device with a screen unit and light guide unit is integrated into the hand-held power tool, featuring a protective ring design that includes a screen element and light guide elements to prevent light blinding and enhance illumination, along with an ergonomic design that optimizes the ratio of handle recess to tool holder dimensions for improved comfort and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a light source is integrated into the hand-held power tool, then illumination of the workpiece is improved, but the operator may experience blinding
Solution Approach 1:
The protective device is divided into functionally distinct elements: a screen unit for blocking harmful light and a light guide unit for directing useful light. This segmentation allows independent optimization of each function - the screen blocks light in operator directions while the light guide directs light to the workpiece area, resolving the contradiction between illumination and blinding prevention
Solution Approach 2:
The protective device acts as an intermediary component between the light source and the external environment. It mediates light distribution by using the screen unit to filter harmful directions and the light guide unit to channel useful light, thereby enabling the light source to illuminate the workpiece without causing operator blinding
2Reliability
If the protective device includes screen unit and light guide unit, then operating safety and comfort are improved, but device complexity increases
Solution Approach 1:
The protective device combines multiple functions into a single integrated component: collision protection (original function), light shielding (screen unit), and light guiding (light guide unit). This multi-functionality approach allows the device to provide safety, illumination control, and structural protection simultaneously, improving operating safety without requiring separate components for each function
Solution Approach 2:
The screen unit and light guide unit are merged into a single protective device assembly that attaches to the hand-held power tool. By combining these functions in one integrated structure rather than separate components, the design reduces overall system complexity while maintaining all necessary safety and illumination control functions
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 prevents light blinding, enhances operating comfort, and ensures safe handling by providing precise illumination and a comfortable grip, thereby improving the overall operating experience and safety of hand-held power tools.
Implementation Method 1
The light guide unit is intended to guide and/or emit light from the at least one light source
Implementation Method 2
The light guide unit has at least one emitting element, in particular a light-scattering element, for example in the form of a roughening, a scattering glass, plastic or ceramic plate
Implementation Method 3
The screen unit is provided in particular for shielding an area from the incidence of light from the at least one light source
Data Source
AI summary
A protection device, for a hand-held power tool for collision protection, of a tool and/or a tool holder configured to be arranged on the hand-held power tool, with objects in a working environment of the hand-held power tool, includes a base element and a fastening unit including at least two fixing rails which extend parallel to one another and have at least two latching recesses configured to releasably fasten the base element to the hand-held power tool.