Safety Insulin Pen Needle Trigger Protector Mechanism
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Solution Overview
Problem
Existing safety insulin injection needles lack timely protection against cross-infection, are inconvenient to use, and have high operational and financial burdens due to complex structures and high manufacturing costs.
Innovation Solution
A safety insulin pen needle design featuring a clamping-fixing piece with elastic jaws, a self-triggering protector mechanism, and a sleeve-shaped shell with guide grooves and a spring bolt structure, allowing for flexible injection angles and immediate needle tip protection after use, reducing reuse risks and manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a needle sheath and self-locking mechanism are added to provide protection, then safety against cross-infection is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent removes the needle sheath from the traditional safety injection needle structure, extracting the protective function from a separate component and integrating it into the needle hub itself through a built-in protector mechanism. This reduces structural complexity while maintaining safety functionality.
Solution Approach 2:
The patent merges the protective function with the needle hub by integrating a built-in protector mechanism directly into the needle hub structure. This combination eliminates the need for separate needle sheaths and self-locking mechanisms, reducing overall device complexity while maintaining safety against cross-infection.
2Reliability
If a needle sheath is used for protection, then safety is improved, but ease of operation deteriorates due to restricted injection angles
Solution Approach 1:
The patent removes the needle sheath that was causing operational restrictions, extracting the protective function and integrating it into the needle hub. This elimination of the sheath restores full injection angle flexibility while maintaining safety through the built-in protector mechanism.
3Reliability
If a needle sheath and protective structures are added, then safety is improved, but needle insertion resistance increases
Solution Approach 1:
The patent removes the needle sheath that created insertion resistance, extracting the protective function and integrating it into the needle hub structure. This eliminates the additional friction and resistance caused by the sheath while maintaining safety through the built-in protector.
4Reliability
If a complex safety mechanism is implemented, then safety against cross-infection is improved, but manufacturing cost increases
Solution Approach 1:
The patent merges the protective function with the needle hub by integrating a built-in protector mechanism directly into the needle hub structure. This integration eliminates the need for separate needle sheaths and self-locking mechanisms, simplifying the manufacturing process and reducing costs while maintaining safety functionality.
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 enhances user safety by preventing accidental needle exposure, reduces operation difficulty, and lowers manufacturing costs while maintaining safety and practicality.
Implementation Method 1
a spring bolt structure, allowing for flexible injection angles and immediate needle tip protection after use
Implementation Method 2
a clamping-fixing piece with elastic jaws
Data Source
Figure 1~2
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Figure 5~6
AI summary
Provided is a safety insulin pen needle, comprising a needle hub, a needle tube assembly base arranged on the needle hub, and a needle tube, and also comprising a trigger protector arranged outside the needle hub and a spring arranged between the trigger protector and the needle hub; a guide groove with a special structure is arranged on the side wall of the trigger protector, and a clamping column corresponding to the guide groove is arranged on the outer edge of the side wall of the needle hub, so that the trigger protector is in a to-be-triggered state before use, and is triggered only when in use, thus an injection needle can be protected from being exposed to the outside after use, and cross-infection caused by mistakenly touching or reusing is avoided. The safety insulin pen needle provided by the invention overcomes the defects that the traditional injection needle easily causes cross-infection due to no protecting device and the existing safety needle is inconvenient to use, has the advantages of simple structure and low manufacturing cost, and is suitable for being used by a patient for a long time.