Pre-filled Syringe Connecting Tool Prevents Erroneous Needle Attachment
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Solution Overview
Problem
Existing drug delivering apparatuses face structural complexity and increased residual liquid volume when attaching an injection needle, leading to potential drug delivery issues and complications in the connector member's design.
Innovation Solution
A drug delivering apparatus with a pre-filled syringe featuring a cylindrical container, a nozzle portion, and an injection needle attachment portion, along with a connecting tool that includes a partitioning portion and a nozzle insertion portion to prevent erroneous needle attachment, utilizing a cap member with a guiding groove to ensure the injection needle is correctly aligned and attached only after drug preparation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If an injection needle attachment portion is provided on the pre-filled syringe, then the injection needle can be attached, but erroneous attachment before drug preparation may occur
Solution Approach 1:
The connecting tool is attached to the pre-filled syringe before the injection needle, establishing a preliminary connection that blocks the injection needle attachment portion. This preliminary action prevents erroneous attachment by ensuring the injection needle can only be attached after the connecting tool is removed following successful drug preparation.
Solution Approach 2:
The connecting tool serves as an intermediary component between the pre-filled syringe and the injection needle. It mediates the attachment process by temporarily occupying the injection needle attachment portion, allowing drug preparation to occur first, and then being removed to enable safe injection needle attachment.
2Adaptability or versatility
If a connecting tool is used to connect pre-filled syringe and drug container, then drug preparation is enabled, but structural complexity increases
Solution Approach 1:
The connecting tool is segmented into distinct functional portions: a drug container insertion attachment portion for connecting to the drug container, and a pre-filled syringe insertion attachment portion for connecting to the pre-filled syringe. This segmentation allows each portion to be optimized independently while maintaining overall functionality.
Solution Approach 2:
The connecting tool is designed with universal attachment capabilities that can connect to both the drug container and the pre-filled syringe using standardized insertion mechanisms. This multi-functionality enables a single tool to perform multiple operations: connecting containers, enabling drug preparation, and preventing erroneous needle attachment.
3Reliability
If the distal end of pre-filled syringe is configured not to allow injection needle attachment, then erroneous attachment is prevented, but injection needle must be attached to connector member increasing discharge path volume
Solution Approach 1:
The connecting tool is attached to the pre-filled syringe in advance, establishing a preliminary connection that blocks the injection needle attachment portion. This allows drug preparation to occur first through the connecting tool, and only after successful preparation can the injection needle be attached to replace the connecting tool, minimizing discharge path volume.
Solution Approach 2:
The connecting tool acts as a temporary intermediary that occupies the injection needle attachment portion during drug preparation. After preparation is complete, the connecting tool is removed and the injection needle is attached directly to the pre-filled syringe, avoiding the need for a permanent connector member and minimizing discharge path volume.
Data Source
AI summary
A drug delivering apparatus includes a drug container, a pre-filled syringe including a cylindrical container having a nozzle portion and an injection needle attachment portion, and a connecting tool configured to allow communication between the inside of the cylindrical container and the inside of the drug container. The connecting tool further includes a nozzle insertion portion. The pre-filled syringe further includes a cap member configured to be detachably fitted on the injection needle attachment portion, the cap member having an opening into which the nozzle insertion portion can be inserted. The injection needle attachment portion has a guiding groove in the inner periphery thereof. In the state where the cap member is fitted on the injection attachment portion, at least a part of the edge of the opening is located on the inner side relative to the bottom portion of the guiding groove.