Puncture Needle Cartridge with Segmented Disposable Body
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Solution Overview
Problem
Conventional lancet systems for blood sugar measurement are cumbersome and pose hygiene risks due to the need for frequent needle replacement, leading to dull needles and increased pain, as well as potential user injury during handling and disposal.
Innovation Solution
A puncture needle cartridge with multiple needles arranged in a line, where each needle is integrally molded with a substrate, allowing for continuous loading and safe disposal without exposing the needle during use, featuring a mechanism for holding and discarding used needles without manual contact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a single puncture needle is used repeatedly for blood collection, then the operation becomes simpler and less troublesome, but the needle tip becomes dull causing more pain and hygiene risks increase
Solution Approach 1:
The puncture needle is divided into two separate parts: a reusable needle holder and a disposable needle body. The needle body is detached after each use and discarded, while the needle holder remains for repeated use. This segmentation allows the system to maintain hygiene safety through single-use needle bodies while preserving operational simplicity through the reusable holder.
Solution Approach 2:
The needle body is designed as a disposable component that is discarded after a single use. This eliminates the need for sterilization and ensures consistent sharpness, addressing hygiene and performance reliability while maintaining simple operation through the reusable holder.
2Reliability
If manual needle replacement is required for each blood collection, then hygiene safety is maintained, but the operation becomes very troublesome especially for visually handicapped patients
Solution Approach 1:
The needle holder is designed to automatically retain the needle body after detachment from the cartridge, eliminating the need for manual handling or transfer of the sharp needle. The system self-services by maintaining needle security through its mechanical structure, greatly simplifying the operation for users including visually handicapped patients while preserving hygiene safety.
3Ease of operation
If the puncture needle is exposed during handling and replacement, then the needle can be easily manipulated, but the risk of user injury increases
Solution Approach 1:
The needle body is nested within the needle holder, which provides a protective structure. The holder contains the sharp needle during storage, transfer, and disposal operations, exposing it only during the actual puncture moment. This nesting arrangement maintains ease of manipulation while significantly reducing the risk of accidental injury to the user.
4Productivity
If multiple puncture needles are held in the cartridge, then continuous blood collection is enabled, but the device complexity increases
Solution Approach 1:
The cartridge system is segmented into a reusable needle holder and a disposable cartridge containing multiple needle bodies. This segmentation allows continuous blood collection through multiple needles while keeping the reusable holder structure simple. The complexity of holding multiple needles is contained within the disposable cartridge, which is replaced when exhausted.
Data Source
AI summary
A lancet is pressed against a puncture needle cartridge while fitting a puncture needle loading inlet of the lancet to the axis of a puncture needle on the puncture needle cartridge. In order to facilitate the operation, one of plural puncture needles, arranged in parallel, is tilted up from its initial position at a predetermined angle, and the puncture needle is guided into a puncture needle holding rod of the lancet. Simultaneously, the puncture needle is pressed up to a position where the rear end part of the needle pushes the bottom surface of a puncture needle loading chamber of the puncture needle holding rod, whereby the puncture needle is loaded. When discarding a used puncture needle, the puncture needle is inserted into a lancet guide member of the puncture needle cartridge, whereby the puncture needle is reliably captured to be discarded.