Magnesium Alloy Protective Mask Frame with Curved Rods
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Solution Overview
Problem
Conventional protective masks made of plastic are heavy due to the need for thick structural components to ensure strength, which limits weight reduction and can impair vision due to reduced spacing between rods.
Innovation Solution
A protective mask with a main frame body made of magnesium alloy, featuring curved first and second rods with specific thickness ratios and protrusions, molded as one piece via semi-solid metal casting, providing enhanced impact resistance and reduced weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If the mask is made of plastic material, then the weight can be reduced, but the structural strength is insufficient and requires thicker components
Solution Approach 1:
The patent changes the material parameter from plastic to magnesium alloy, which has inherently higher strength-to-weight ratio. This material substitution allows the mask to achieve both weight reduction and improved structural strength simultaneously, resolving the contradiction between lightweight design and structural integrity
Solution Approach 2:
The patent employs magnesium alloy, a composite material known for its high strength-to-weight ratio. This material choice enables the mask to maintain structural strength while being lighter than plastic alternatives, effectively resolving the trade-off between weight and strength
2Strength
If the rod portions are made sufficiently thick to ensure structural strength, then the impact resistance is improved, but the overall weight cannot be effectively reduced
Solution Approach 1:
By changing the material parameter to magnesium alloy with superior strength-to-weight properties, the patent allows rod portions to achieve sufficient impact resistance with reduced thickness, thereby reducing overall weight while maintaining structural strength
Solution Approach 2:
The patent applies different thickness characteristics to different parts of the rod portions. The front surface has greater thickness for impact resistance, while connecting surfaces have optimized thickness to reduce weight. This localized quality differentiation resolves the contradiction between impact resistance and weight reduction
3Strength
If the distance between two adjacent rod portions is shortened to improve structural strength, then the mask becomes more robust, but the user's visual sight is adversely affected
Solution Approach 1:
The material parameter change to magnesium alloy enables the rods to maintain structural strength with optimized spacing. The high strength-to-weight ratio of the alloy allows for increased distance between rods without compromising structural integrity, thereby improving visual sight while maintaining robustness
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 magnesium alloy mask offers improved impact resistance and reduced weight, allowing for better vision by enlarging the spacing between rods, while distributing impact stress effectively to prevent concentration at protrusions.
Implementation Method 1
distributing impact stress effectively to prevent concentration at protrusions
Data Source
AI summary
A protective mask includes a main frame body made of magnesium alloy and having an imaginary vertical central line. The main frame body has a plurality of first rods arranged along the central line, a plurality of second rods, and at least one first protrusion. Each of the first rods has spaced-apart first front and rear surfaces, and two opposite first connecting surfaces interconnecting the first front and rear surfaces. A thickness between the first front and rear surfaces is larger than a thickness between the first connecting surfaces. Each of the second rods is connected between two adjacent ones of the first rods. The first protrusion protrudes from the first front surface of one of the first rods.