Double Pivot Shield Stabilizes Needle Cannula
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Solution Overview
Problem
Current blood collection systems face challenges in minimizing accidental needle-stick wounds and vibration-induced adverse effects during venipuncture, as existing safety shields and needle assemblies do not effectively absorb vibrations or prevent undesired movement of the needle cannula.
Innovation Solution
A shieldable needle device with a pivotable shield assembly and integral hub design that absorbs vibrations and stabilizes the needle cannula, featuring a dorsal fin for handling and a locking mechanism to securely shield the needle tip after use, preventing accidental exposure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a traditional separate shield and needle assembly is used, then the device is easier to manufacture, but the needle vibration is not effectively absorbed and stability is reduced
Solution Approach 1:
The patent combines the shield and needle assembly into a single integrated unit where the shield serves dual functions as both a protective barrier and a vibration-damping structure. The shield is directly attached to the needle hub, eliminating separate components and reducing assembly complexity while improving stability through the integrated design.
Solution Approach 2:
The shield is constructed from materials with specific damping properties that absorb needle vibration during insertion. The composite structure combines the sharpness of the needle with the vibration-absorbing characteristics of the shield material, resolving the contradiction between stability and manufacturing simplicity.
2Reliability
If a simple shield design is used, then the manufacturing cost is reduced, but the ability to prevent accidental needle-stick wounds is insufficient
Solution Approach 1:
The shield is designed with movable or flexible elements that allow it to dynamically respond to insertion forces while maintaining protective coverage. This dynamic design enhances safety by ensuring the shield remains in place during use, while the simplicity of the movable mechanism keeps manufacturing costs low.
Solution Approach 2:
The shield incorporates flexible material structures that can deform to accommodate needle insertion while maintaining continuous coverage. This flexible design provides reliable protection against needle-stick wounds without requiring complex rigid structures, thus maintaining ease of manufacture.
3Manufacturing precision
If a rigid shield structure is used, then the manufacturing precision is improved, but the vibration absorption capability is reduced
Solution Approach 1:
The shield design incorporates controlled variations in material properties or structural parameters along its length, with denser or more rigid sections for precision and softer or more flexible sections for vibration absorption. This parameter variation resolves the contradiction by allowing both precise manufacturing and effective vibration damping.
Solution Approach 2:
The shield uses composite material construction combining rigid components for structural precision and flexible components for vibration absorption. This layered or mixed-material approach maintains manufacturing precision while effectively reducing harmful needle vibrations during insertion.
Data Source
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Figure 3A~3B
AI summary
A shieldable needle device (10) including a shield assembly (60) having a first shield member (62) extending from a first side of a hub (30) and a second shield member (64) extending from a second side of the hub, the second side being substantially opposite the first side is disclosed. The shield assembly is pivotable between an open position in which a needle cannula is exposed and the first shield member is spaced apart from the second shield member and a shield position in which the first shield member contacts the second shield member and at least a portion of the first shield member and the second shield member are disposed over the distal end of the needle cannula. In one embodiment, the hub, the first shield member, and the second shield member form an integral component.