Needle Protective Cap Assembly with Rackable Bushing for Anti-Bending
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Solution Overview
Problem
Existing protective caps for inflation needles are limited in applicability due to their design, which requires attachment to specific syringe bodies, and do not effectively prevent bending and breaking, posing a risk of injury and reducing the needle's lifespan.
Innovation Solution
A protective cap assembly that directly attaches to the needle stem, featuring a base ring, bushing, and cap that allow relative movement, providing a restoring force to resist deflection and prevent bending, thus extending the needle's lifespan and reducing injury risk.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a protective cap is designed to attach to specific syringe bodies, then the cap can provide protection, but the applicability is limited to specific needle types
Solution Approach 1:
The protective cap is designed with a universal interface that can accommodate multiple needle types and configurations. The cap structure includes adaptable engagement features that can interface with different needle bodies, pump handles, and syringe types without requiring type-specific designs, thereby achieving multi-functionality and broad applicability.
Solution Approach 2:
The protective cap is divided into distinct functional segments: a body portion for covering the needle, a engagement mechanism for attachment, and a shielding component for tip protection. This segmentation allows each component to be optimized independently while maintaining overall versatility across different needle types.
2Stability of the object's composition
If the protective cap is rigidly connected, then structural stability is improved, but resistance to bending and breaking is reduced
Solution Approach 1:
The connection between the protective cap components transitions from rigid to dynamic. The engagement mechanism incorporates movable elements that allow the cap to flex and absorb impact forces during use, enabling the structure to adapt to bending stresses while maintaining overall stability and preventing catastrophic failure.
Solution Approach 2:
The protective cap incorporates flexible structural elements and thin-walled components that can deform elastically under bending loads. These flexible portions absorb impact energy and prevent stress concentration, thereby increasing resistance to breaking while maintaining sufficient structural stability through the overall cap geometry.
3Object-affected harmful factors
If the protective cap covers the needle tip, then injury risk is reduced, but access to the needle tip is restricted
Solution Approach 1:
The needle tip is extracted from the covered portion and positioned in a accessible location. The protective cap covers the shaft and body of the needle while leaving the tip exposed or easily accessible through an opening, allowing the tip to remain functional for inflation purposes while the protected portions prevent injury during handling and storage.
Solution Approach 2:
The protective cap acts as an intermediary structure that separates the hazardous needle tip from user contact while maintaining functional access. The cap design includes features such as tapered openings or removable portions that mediate between protection and accessibility, allowing the tip to be reached when needed while preventing accidental contact during normal handling.
Data Source
AI summary
A needle protection assembly with a cap that connects directly to a needle, thereby protecting the stem from bending. The needle protection assembly further provides a base ring for circumscribing a base portion of the needle and a bushing that interconnects the cap and the base ring, wherein there is no fixed connection between the cap and the bushing nor between the bushing and the base ring so that the bushing can rack relative to the base ring when a deflection force is imparted on the cap.