Puncture Needle Protector Locking via Recessed Reinforcing Ribs
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Solution Overview
Problem
Conventional protector-attached puncture needles lack a positioning mechanism for the protector before use, leading to potential displacement during transportation and packing, and require complex operations for cap removal, compromising usability.
Innovation Solution
A puncture needle design with a tiltably supported protector featuring reinforcing ribs and recesses to secure the protector's position, preventing outward protrusion and simplifying cap removal through a locking mechanism that stabilizes the protector's tilt position before use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the protector is made tiltably supported without a positioning mechanism, then the protector can be easily removed and installed, but the protector may be displaced outward during transportation and packing
Solution Approach 1:
The recesses are formed in advance on the reinforcing ribs before assembly, creating pre-positioning features that guide the cap's outer peripheral portion into the correct location. This preliminary structural preparation ensures the protector maintains its tilted retracted position during transportation without requiring additional positioning mechanisms.
2Device complexity
If the protector is made tiltably supported without a positioning mechanism, then the structure is simpler, but complicated operation is required to separate the protector from the cap in the tilting direction
Solution Approach 1:
The recesses on the reinforcing ribs act as intermediary positioning features between the cap and protector. These recesses guide the outer peripheral portion of the cap, creating a natural separation path that simplifies the operation of removing the cap from the protector in the tilting direction.
3Stability of the object's composition
If reinforcing ribs are added to the protector, then the protector position is stabilized, but the device complexity increases
Solution Approach 1:
Instead of adding complex positioning mechanisms throughout the protector structure, recesses are locally formed only on specific reinforcing ribs at critical positions. This localized approach provides necessary stabilization while minimizing overall structural complexity.
Data Source
AI summary
A protector-attached puncture needle 10 in which a protector 14 is tiltably supported by a needle hub 18 of a puncture needle 12, and the protector 14 includes an accommodating groove 40 which opens toward the puncture needle 12 in a tilting direction and accommodates the puncture needle 12. Inner surfaces of both side walls 44, 44 of the accommodating groove 12 of the protector 14 include respective reinforcing ribs 52, 52 extending from a groove bottom portion toward a groove opening side. The reinforcing rib 52, 52 include respective recesses 54, 54 each opening to the inner surface of each of the side walls 44, 44. Diametrically both sides of an outer peripheral portion of a cap 30 enter and are locked in the respective recesses 54, 54 of the reinforcing ribs 52, 52 such that a tilt position of the protector 14 in an unused state before removal of the cap 30 is held.