Syringe Needle Shield with Pivoting Snap-Lock Mechanism
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Solution Overview
Problem
Conventional syringe needle shields do not effectively prevent injury from used needles, as they may not securely attach to the needle hub and can be easily dislodged, potentially exposing the needle during medical procedures.
Innovation Solution
A syringe needle shield comprising two pivotally connected parts with a snapping mechanism and a positioning device, which securely fixes the shield to the needle hub, ensuring it cannot be separated once engaged, and allows for easy installation and adjustment without interfering with medical procedures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional needle shield is used, then the shield can be attached to the needle hub, but it may be easily dislodged and cannot securely prevent needle exposure
Solution Approach 1:
The shield is divided into a first part and a second part that can pivot relative to each other. The first part attaches to the needle hub while the second part forms the shielding barrier. This segmentation allows the shield to securely attach via the first part while maintaining an effective blocking structure with the second part, preventing dislodgement and needle exposure.
Solution Approach 2:
The pivotable connection between the first part and second part allows the shield to dynamically adjust its position. The second part can pivot toward the first part to engage the snapping mechanism for secure attachment, or pivot away to allow installation and removal. This dynamic capability ensures reliable attachment while maintaining ease of operation.
2Reliability
If a secure snapping mechanism is implemented, then the shield cannot be separated once engaged, but the device complexity increases
Solution Approach 1:
The snapping mechanism integrates the first positioning portion and second positioning portion into a unified engagement system. The first positioning portion on the first part and the second positioning portion on the second part work together to create a secure, non-separable connection once engaged. This merging of positioning elements achieves high attachment security without requiring multiple independent complex mechanisms.
3Ease of operation
If a pivotable shield design is used, then the shield can be adjusted to first and second positions, but the attachment stability may be compromised
Solution Approach 1:
The pivotable connection between the first part and second part allows the shield to dynamically adjust its position. The second part can pivot toward the first part to engage the snapping mechanism for secure attachment, or pivot away to allow installation and removal. This dynamic capability ensures reliable attachment while maintaining ease of operation.
Solution Approach 2:
The shield is pre-configured with the first part attached to the needle hub and the second part positioned to form the shielding barrier. The pivotable connection is pre-established, allowing the shield to be quickly positioned and secured without requiring complex assembly steps during use. This preliminary configuration maintains both operational ease and attachment stability.
Data Source
AI summary
A syringe needle shield that includes a first part and a second part. The first part is connected to the second part by a pivotable first connection portion. The second part is pivotable on the first connection portion toward the first part, and a needle hub is clamped between the first and second parts. The first and second parts are securely connected to each other by the first snapping portion which cannot be unlocked from each other. The first part is connected to a needle shield by a flexible plate. The shield receives a push force from its back so as to move from a first position to a second position. When the shield is located at the second position, a restriction portion is fixedly engaged with an engaging portion.