Removable Welding Shield for Helmet Weight Reduction
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Solution Overview
Problem
Conventional welding helmets with integrated welding shields are unstable and uncomfortable due to the weight of the shields, which can shift the center of gravity and apply uneven pressure on the wearer's head and neck, especially when the shields are moved or not in use.
Innovation Solution
A welding helmet design featuring a selectively removable and rotatable outer shell with a first shield that can be moved between multiple positions, including a fully downward operative position, an upwardly rotated inoperative position, and a completely removed position, allowing for reduced weight and improved comfort by exposing a more transparent second shield for unimpeded viewing during non-welding tasks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the welding shield is integrated and fixed to the welding helmet, then the welding shield provides stable protection during welding, but the weight of the welding shield causes the helmet to become unstable and apply uneven pressure to the wearer's head and neck
Solution Approach 1:
The welding shield is segmented from the helmet body through a rotatable connection mechanism, allowing it to be separated into independent functional units. This enables the shield to be positioned only when needed while the helmet remains lightweight and stable during non-welding tasks.
Solution Approach 2:
The welding shield is made dynamic through a rotatable connection that allows it to move between a protective position (covering the face) and a retracted position (out of the way). This dynamic positioning resolves the contradiction by providing stability when needed while eliminating weight interference during other tasks.
2Adaptability or versatility
If the welding shield is moved to another location on the welding helmet, then the wearer can view through only the grinding shield for non-welding processes, but the weight of the welding shield remains with the helmet causing discomfort and instability
Solution Approach 1:
The welding shield transitions from a static integrated component to a dynamic removable component. The rotatable connection allows the shield to be easily moved between positions and completely removed when not needed, providing adaptability for different processes while eliminating the weight burden on the helmet.
Solution Approach 2:
The welding shield is extracted from the permanent structure of the helmet, allowing it to be taken out completely when not needed. This extraction principle resolves the contradiction by providing versatility when the shield is attached but eliminating weight and instability when it is removed.
3Adaptability or versatility
If the welding shield remains coupled to the welding helmet at all positions, then the shield is always available for welding, but the weight continuously applies pressure to the wearer's head and neck even when the shield is not in use
Solution Approach 1:
The welding shield connection changes from permanently fixed to dynamically adjustable. The rotatable mechanism allows the shield to be quickly positioned or removed based on task requirements, providing availability when needed while eliminating continuous pressure during non-welding tasks.
Data Source
AI summary
In one aspect, a protective headwear is provided and includes a headgear, an outer shell rotatably coupled to the headgear, and a first shield coupled to the outer shell and rotatable between a first position and a second position. The first shield is selectively removable from the outer shell without the use of tools. The protective headwear also includes a second shield coupled to the outer shell. The first shield covers the second shield to a greater extent in the first position than in the second position. In one aspect, a method of manufacturing a protective headwear is provided.