Exhaust Air Guide Element for Hand Tool Operator Protection
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Solution Overview
Problem
Despite safety regulations and shielding elements, motor-operated hand tools like angle grinders pose a health risk due to uncontrolled exhaust air flows that can reach the operator's face, especially when no workpiece is being processed, as dust particles can bypass protective goggles and enter the eyes.
Innovation Solution
An exhaust air protection device with a flat air guide element and spacer attachment system that can be securely fastened to the hand tool, using a through hole and spacer element to stabilize and direct the air flow, preventing unwanted air currents from reaching the operator.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a shielding element is used on the hand tool, then particle-laden air is blocked to some extent, but uncontrolled exhaust air flows still occur between the housing and shielding element that can reach the operator's face
Solution Approach 1:
The invention extracts and addresses the specific problem of uncontrolled exhaust air flow between the housing and shielding element by introducing a separate air guide element that specifically targets this gap area, rather than relying solely on the general shielding element
Solution Approach 2:
The air guide element acts as an intermediary component between the housing and shielding element, specifically managing the air flow in the gap region and redirecting it away from the operator's face
2Object-affected harmful factors
If safety goggles are worn, then eye protection is provided, but dust particles can still bypass the goggles and enter the eyes through exhaust air flow past the lower edge
Solution Approach 1:
The air guide element performs preliminary protection by redirecting exhaust air flow away from the operator's face before the air can reach the lower edge of the protective goggles, thus preventing particles from bypassing the goggles
3Device complexity
If a flat air guide element is used, then the device is simple and can be easily attached, but adequate attachment stability must still be ensured
Solution Approach 1:
The invention transitions from a two-dimensional flat air guide element to a three-dimensional attachment structure by adding a spacer element with thickness, creating a volumetric attachment system that provides stable mounting while maintaining the simplicity of the flat guide surface
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
An exhaust air protection device (11) for a motor-operated hand tool (1) comprises a flat air guide element (12) with a through-hole (13) for attachment to the hand tool (1).