Modular Injection Needle Apparatus with Separable Safety Sleeve
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Solution Overview
Problem
Current injection needles are difficult to dispose of safely due to their fixed connection with the injection cylinder, leading to increased waste volume and risk of injury, and they cannot be used with fixed injection devices like drip cylinders.
Innovation Solution
A modular injection needle apparatus with a separable needle seat and safety sleeve, where the safety sleeve can move between installation and protection positions, allowing for easy separation from the injection cylinder and safe disposal, and enabling the injection of drug liquids into fixed devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the injection needle is fixed to the injection cylinder, then the injection needle can be protected during injection, but the waste volume increases and disposal becomes difficult
Solution Approach 1:
The injection needle assembly is segmented into separable components: the needle seat with buckle and the safety sleeve can be detached from the injection cylinder after use. This allows the needle and safety sleeve to be disposed of separately from the reusable injection cylinder, reducing waste volume while maintaining protection during injection
Solution Approach 2:
The needle seat and safety sleeve are extracted as removable components from the injection cylinder system. The buckle mechanism enables easy detachment, allowing the disposable parts (needle and safety sleeve) to be separated and discarded while retaining the injection cylinder for reuse
2Device complexity
If the injection needle is fixed to the injection cylinder, then the structure is simple, but the adaptability to fixed injection devices is reduced
Solution Approach 1:
The injection system is divided into a reusable injection cylinder and a separable needle assembly. This segmentation allows the injection cylinder to be used with different needle assemblies, including fixed injection devices like drip cylinders, while keeping the overall structure relatively simple through standardized connection interfaces
Solution Approach 2:
The injection cylinder is designed as a universal component that can accommodate different needle assemblies through the standardized buckle connection. This allows the same injection cylinder to be used with various needle types and fixed injection devices, enhancing versatility without significantly increasing structural complexity
3Object-affected harmful factors
If the safety sleeve covers the injection needle in installation position, then protection is provided, but the operation complexity increases
Solution Approach 1:
The safety sleeve is designed to be movable along the injection cylinder, transitioning between an installation position (covering the needle for protection) and a retracted position (allowing needle access). This dynamic movement provides protection when needed while minimizing operational complexity through simple linear motion
Solution Approach 2:
The safety sleeve acts as an intermediary component between the injection needle and the user/environment. It provides protection during storage and transport, then moves aside during injection to allow needle function, and can be detached afterward for disposal, simplifying the overall operation sequence
Data Source
AI summary
An injection needle apparatus with safe-protection function includes: an injection module having an injection cylinder and a pullable piston rod; a needle module including a needle seat and an injection needle; the needle seat having a seat body and a buckle. In installation state, a safety sleeve covering movably around the injection cylinder between an installation position and a protection position. In the installing position, a first end portion of the safety sleeve is near the buckle and the second end portion thereof is near the handhold portion; while in the protection position, the first end portion is protruded from the injection cylinder for covering the injection needle and the second end portion is near the head portion of the injection cylinder. An inner side of the sleeve body is formed with a first and a second annular flange; and an annular groove is formed therebetween for confining the buckle.