Rotating Sleeve Syringe Lock for Irreversible Needle Shielding
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Solution Overview
Problem
Existing safety syringes are complex, require multiple parts, and involve springs and secondary shields, increasing material and labor costs, while posing a risk of reuse and infection.
Innovation Solution
A safety lock syringe assembly with a threaded sleeve that rotates into three positions - injection, shielded, and locked - using lugs and a sleeve locking mechanism, eliminating the need for a secondary shield and spring, and reducing parts and complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional safety syringe designs with springs and secondary shields are used, then needle protection and safety are improved, but device complexity and material requirements increase
Solution Approach 1:
The patent combines the protective shield and locking mechanism into a single integrated sleeve component. The sleeve includes both the needle-shielding function and the revolve lock mechanism, eliminating the need for separate secondary shields and springs found in traditional designs. This merging reduces the number of parts while maintaining safety functionality.
Solution Approach 2:
The sleeve serves multiple functions simultaneously: it protects the needle during storage, allows needle exposure for injection, provides needle coverage after use, and implements irreversible locking through the revolve lock mechanism. This multi-functionality eliminates the need for separate components for each function, reducing overall device complexity.
2Reliability
If traditional safety syringe designs with multiple components are used, then safety functionality is improved, but manufacturing cost and assembly complexity increase
Solution Approach 1:
By integrating the locking mechanism directly into the sleeve structure, the patent reduces the number of assembly steps. The sleeve is assembled as a single component with the barrel and needle, eliminating the need to separately assemble springs, secondary shields, and locking mechanisms as in traditional designs.
Solution Approach 2:
The patent extracts and eliminates unnecessary components such as springs and secondary shields from traditional safety syringe designs. The revolve lock mechanism achieves the same safety functionality with a simpler structure that requires fewer manufacturing operations and less specialized assembly procedures.
3Reliability
If larger barrel designs are used for sleeves and secondary shields, then safety coverage is improved, but material requirements and device size increase
Solution Approach 1:
The integrated sleeve design provides complete needle coverage without requiring a separate secondary shield. By combining the protective function and locking function in one component, the design uses material more efficiently, avoiding the excess material required for multiple overlapping components in traditional designs.
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
The design reduces material and assembly complexity, prevents reuse, and enhances safety by irreversibly locking the needle after use, thus minimizing the risk of infection and cost.
Implementation Method 1
The sleeve includes threads that engage the one or more lugs, the sleeve threadably rotates in a first direction to a first position that exposes the needle, the sleeve threadably rotates in a second direction to a second position that shields the needle
Implementation Method 2
the sleeve threadably rotates in the second direction to a third position that engages the one or more lugs to the sleeve locking mechanism to irreversibly lock the shield to the barrel
Data Source
AI summary
A safety lock syringe assembly comprising a barrel including a distal end and a proximal end, one or more lugs extending outwardly from an outer surface of the barrel, and a needle extending from the distal end, and a sleeve having threads that engage the one or more lugs, the sleeve includes a sleeve locking mechanism, wherein the sleeve threadably rotates in a first direction to a first position that exposes the needle, the sleeve threadably rotates in a second direction to a second position that shields the needle, and the sleeve threadably rotates in the second direction to a third position that engages the one or more lugs to the sleeve locking mechanism to irreversibly lock the shield to the barrel.