Facial Shield Hook Mechanism for Sterile Attachment
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Solution Overview
Problem
Current personal protection systems, such as helmets with facial shields, are complex and expensive to manufacture due to geometrical requirements for secure attachment, which complicates sterile procedures and increases the risk of contamination during donning and use, especially in medical or hazardous environments.
Innovation Solution
A protective headgear system with a polymeric facial shield and hook mechanism that allows for easy and secure attachment to the headgear without direct contact, utilizing elongated holes and hooks for a snap-and-slide locking mechanism that simplifies donning and reduces contamination risk.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional secure attachment mechanisms are used for facial shields, then the attachment reliability is improved, but the device complexity and manufacturing cost increase
Solution Approach 1:
The attachment mechanism is divided into separate components: hooks on the headgear and corresponding holes in the facial shield. This segmentation allows for simpler individual parts that are easier to manufacture while maintaining secure attachment when assembled.
Solution Approach 2:
The facial shield integrates attachment features (holes) directly into its structure, and the headgear integrates corresponding hooks. These nested features work together to provide secure attachment without requiring additional separate components, reducing overall device complexity.
2Reliability
If complex geometrical requirements are imposed for secure attachment, then the attachment reliability is improved, but the manufacturing cost and difficulty increase
Solution Approach 1:
The attachment system uses simple segmented features (hooks and holes) rather than complex geometrical forms. This segmentation allows each component to be manufactured using standard, cost-effective processes while maintaining secure attachment capability.
Solution Approach 2:
The design specifies dimensional parameters for the holes (e.g., diameter, spacing) that optimize attachment reliability while remaining compatible with standard manufacturing tolerances. This allows for reliable attachment without requiring expensive precision manufacturing processes.
3Reliability
If direct contact mechanisms are used for attaching facial shields, then the attachment security is improved, but the risk of contamination during donning increases
Solution Approach 1:
The hook-and-hole mechanism acts as an intermediary that enables secure attachment without requiring direct hand contact with the facial shield surface. Users can manipulate the hooks from the outside while the shield itself remains uncontaminated, maintaining sterility during donning procedures.
Solution Approach 2:
The attachment features (hooks) are extracted from the facial shield surface and placed on the headgear, allowing users to interact with the headgear components rather than the shield itself. This extraction reduces contamination risk to the critical shield surface while maintaining secure attachment.
4Reliability
If multiple attachment points are used for the facial shield, then the attachment security is improved, but the device complexity increases
Solution Approach 1:
The attachment system is segmented into multiple independent hook-hole pairs distributed across the headgear and shield. Each pair provides independent attachment security, and the modular nature of these segments allows for simple manufacturing and assembly without increasing overall device complexity.
Data Source
AI summary
A facial shield for a protective headgear system includes a polymeric sheet having an upper portion configured to be coupled to a support and a lower portion having a lower extremity, wherein the upper portion includes a first hole, a second hole, and a third hole, each one of the first, second, and third holes laterally spaced from the other two of the first, second, and third holes, and the first hole including a first section having a first hole gap and a second section laterally adjacent the first section and having a second hole gap, wherein the first hole gap of the first hole is greater than or equal to the maximum vertical dimension of a first hook of the support, and wherein the second hole gap of the first hole is greater than a vertical base thickness of a base of the first hook and is less than the maximum vertical dimension of the first hook.