Helmet Respirator Bracket Universal Engagement
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Solution Overview
Problem
Existing protective helmets with respirators face challenges in securely attaching respirators with differently shaped strap-engaging portions, leading to potential detachment due to incompatible shapes between the respirator and helmet, limiting versatility and adaptability.
Innovation Solution
The design incorporates a holding device engagement section with a curved U-shaped stop wall and a rectangular U-shaped stop wall, allowing secure engagement of both rounded and rectangular projections, along with a latching projection for additional stability, and a guide rail system for adjustable fit and pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed-shaped engagement section is used in the helmet, then the structure is simple, but it cannot securely attach respirators with different projection shapes
Solution Approach 1:
The engagement section is designed with a universal interface that can accommodate both rounded and rectangular projections. The U-shaped stop wall with curved inner surfaces can engage with rounded projections, while the straight inner surfaces can engage with rectangular projections, making the helmet compatible with different respirator types without requiring multiple specialized engagement sections.
Solution Approach 2:
The inner surfaces of the U-shaped stop wall have different geometric characteristics at different locations: curved surfaces at certain regions and straight surfaces at other regions. This local variation in surface geometry allows the single engagement section to adapt to different projection shapes, providing shape-specific engagement zones within the same structure.
2Reliability
If elastic elements with high biasing force are used, then the mask holds firmly on the face, but the mask cannot be easily detached from the helmet
Solution Approach 1:
The elastic elements provide dynamic prestensioning that adapts to the attachment state. During normal wear, the elastic elements maintain high biasing force for secure attachment. During detachment, the release mechanism allows the elastic elements to relax, reducing the force barrier and enabling easy removal without compromising the firm hold during use.
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
Enables secure and firm attachment of respirators with various shapes, preventing detachment and allowing for easy adjustment and fit customization, enhancing user safety and versatility.
Implementation Method 1
the mask retaining brackets have an elastic element that can be pretensioned in order to connect the mask retaining brackets to the mask retaining devices on the helmet body. In this way, the biasing force of the elastic elements of the first and second mask holding brackets presses the mask body against the user's face
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The helmet has two breathing mask holding devices comprising engaging portions (1) engaged with engaging portions of headbands respectively, along mating direction (31). Each engaging portion of holding device has a base plate (3) that extends perpendicularly towards U-shaped stop wall (7) having a bottom portion (11) and two opposing leg portions (9a,9b). Distance between mutually facing inner surfaces (13a,13b) of leg portions decreases towards direction of bottom portion. An opening (33) formed perpendicular to mating direction is made to face inside surface of bottom portion.