Needlestick Prevention Assembly With Spring-Driven Needle Retraction
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Solution Overview
Problem
Conventional needlestick prevention devices for injection devices are complex, costly, and difficult to operate, leading to inefficiencies and increased risk of needlestick injuries during and after the injection process.
Innovation Solution
A needlestick prevention device with a fixing sleeve and limiting sleeve that slides along a central axis, featuring locking clips, guiding features, and an accumulation member to automatically retract the needle after use, ensuring safe and efficient needle coverage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional protective devices are used, then needlestick injuries are reduced, but device complexity and operating difficulty increase
Solution Approach 1:
The patent combines the protective device components (fixing sleeve, limiting sleeve, accumulation member, locking clips) into an integrated assembly that works together as a unified system. The fixing sleeve and limiting sleeve are coupled with locking clips that engage with a limiting buckle, creating a compact combined structure that reduces overall complexity while maintaining protective function.
Solution Approach 2:
The fixing sleeve is inserted into the limiting sleeve, creating a nested configuration. The accumulation member (spring) is nested within the fixing sleeve, and the injector component is nested within the fixing sleeve. This nested arrangement allows multiple components to occupy overlapping spatial volumes, reducing the overall device footprint and simplifying the structural layout.
2Reliability
If conventional protective devices are used, then needlestick injuries are reduced, but ease of operation deteriorates
Solution Approach 1:
The locking clips are pre-configured with locking buckles positioned to engage with the limiting buckle before the injection procedure begins. The accumulation member is pre-compressed between the fixing sleeve and limiting sleeve, storing energy ready for automatic retraction. This preliminary setup eliminates the need for complex manual operations during the procedure.
Solution Approach 2:
The accumulation member (spring) automatically drives the retraction of the fixing sleeve and injector component after injection without requiring manual intervention. The locking clips automatically engage and disengage from the limiting buckle based on the position and force applied during the procedure, making the protective device self-regulating and easier to operate.
3Reliability
If automatic needle retraction is implemented, then safety is improved, but device complexity increases
Solution Approach 1:
The patent extracts the retraction function into a dedicated accumulation member (spring) that is separate from the injector component itself. This spring is positioned between the fixing sleeve and limiting sleeve, and its expansion force is directly coupled to drive the retraction motion. By separating this function into a dedicated component, the overall system complexity is managed more effectively.
Solution Approach 2:
The locking clips serve as intermediary elements that mediate between the accumulation member's expansion force and the fixing sleeve's retraction motion. The clips engage with the limiting buckle to control and guide the retraction process, transforming the spring's radial expansion force into linear retraction motion while maintaining safety control.
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 device reduces the risk of needlestick injuries by quickly retracting the needle into the limiting sleeve, improving safety and ease of use through automated mechanisms.
Implementation Method 1
an accumulation member, a fixing sleeve and a limiting sleeve... The accumulation member may be accumulated... In the second state, the locking clips may rotate to separate from the limiting buckle, the fixing sleeve may be released from the limiting sleeve, and the accumulation member may be released
Data Source
AI summary
Disclosed a needlestick prevention device, comprising an injector component, an accumulation member, a fixing sleeve, and a limiting sleeve. The injector component includes a pressing cap, an injector syringe flanging, an injector syringe, and a needle. The fixing sleeve includes a locking clip, a flanging fixing clip, at least one support plate, and a limiting plate. The limiting sleeve includes at least one guiding feature, at least one first limiting hole, at least one second limiting hole, and a limiting buckle. In a first state, the accumulation member is accumulated, and the fixing sleeve is in a first position. In a second state, the locking clip rotates to separate from the limiting buckle, the fixing sleeve is released from the limiting sleeve, and the accumulation member is released. In a third state, the accumulation member is completely released, and the fixing sleeve and the injector component move along the at least one guiding feature to a second position.