Modular Injection Loading Part With Needle Shielding
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Solution Overview
Problem
Existing injection devices face issues such as psychological and physical resistance due to visible needles, high cost, lack of adaptability to different primary packaging, and complexity in operation, especially in single-use pens and devices designed for specific syringes.
Innovation Solution
A modular injection device with a proximal and distal part design, where the distal part receives an injection loader with primary packaging, featuring a visual shield to conceal the needle, allowing easy adaptation to various packaging and user-friendly operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a syringe is used to inject pharmaceutical substances, then the substance can be administered to the patient, but the syringe must be disposed of after a single use creating medical waste
Solution Approach 1:
The injection device is divided into separate components: a reusable body and a disposable loading part. The loading part contains the pre-filled syringe barrel and plunger and is discarded after use, while the body can be sterilized and reused. This segmentation allows the critical sterile pathway components to be disposable while the expensive mechanical components are reusable.
Solution Approach 2:
The loading part is designed as a single-use, disposable component that is discarded after one injection. This eliminates the risk of cross-contamination and ensures sterility without requiring the entire device to be disposable. The loading part includes the syringe barrel, plunger, and needle assembly, all pre-packaged in sterile condition.
2Reliability
If syringes are sterilized using autoclave, then sterility is achieved, but the plunger becomes deformed and stuck in the syringe barrel
Solution Approach 1:
The loading part with syringe barrel and plunger is designed as a disposable component that is sterilized in sealed packaging and discarded after single use. This eliminates the need to repeatedly sterilize the plunger, avoiding cumulative deformation damage. The disposable nature ensures the plunger is always in its original, undeformed state when first used.
Solution Approach 2:
The syringe barrel and plunger are pre-sterilized together as an assembly in the loading part before delivery to the user. This preliminary sterilization occurs in sealed packaging that protects the plunger from thermal and mechanical stress during the sterilization process, preventing deformation before the product even reaches the user.
3Reliability
If the syringe is disassembled for sterilization, then the components can be sterilized separately, but reassembly is required and risk of contamination increases
Solution Approach 1:
The device is segmented into a reusable body and a disposable loading part that remains assembled. The loading part contains the syringe barrel, plunger, and needle as an integrated unit that is sterilized together in sealed packaging. This eliminates the need for disassembly and reassembly while maintaining sterilization effectiveness.
Solution Approach 2:
The loading part is designed as a disposable assembly that is sterilized in its final configured state within sealed packaging. This eliminates the need for disassembly and reassembly operations, reducing contamination risk and simplifying the process. The entire loading part is discarded after use, so no reassembly is required.
4Reliability
If the plunger is pulled out from the syringe barrel for sterilization, then the components can be sterilized separately, but the plunger may become deformed during handling
Solution Approach 1:
The device is segmented into reusable and disposable portions, with the syringe barrel and plunger remaining assembled in the disposable loading part. This allows both components to be sterilized together in a controlled manner without the plunger being handled or pulled out, preventing deformation while ensuring complete sterilization of the assembly.
Solution Approach 2:
The syringe barrel and plunger are pre-sterilized together as an assembled unit in the loading part before delivery. This preliminary sterilization in sealed packaging prevents handling-induced deformation while ensuring complete sterilization of all surfaces that will contact the pharmaceutical substance or patient.
Data Source
Figure 1a~1b
Figure 2
Figure 3~4
AI summary
The invention relates to an injection device (1) for injecting a pharmaceutical substance, comprising a proximal part (5) having a drive (7) for bringing about an injection, and comprising a distal part (13) which is designed to receive an injection loading part (3), which in turn has a packaging receiving part (17) and a primary packaging (23) retained in the packaging receiving part (17), in which a pharmaceutical substance is contained, wherein the pharmaceutical substance can be injected out of the injection loading part (3) if the injection loading part (3) is arranged in the distal part (3), wherein the distal part (13) is designed such that the injection loading part (3) can be axially introduced into the distal part (13), and wherein the injection device (1) has a visual shield (15) which is designed and arranged such that an injection needle (25) of the injection loading part (3) is concealed from a user during use of the injection device (1).