Injection-needle cover flexible membrane smooth extension
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Solution Overview
Problem
The existing injection-needle covers fail to extend smoothly, leading to potential delays in patient care and increased risk of accidents, such as needle sticks, which can cause infections for healthcare practitioners.
Innovation Solution
The design includes a base portion, base hinge, connected portion fitting space forming portion, connecting hinge, and injection needle enclosure portion with specific features like easy sliding portions, hook portions, and flexible body portions to facilitate smooth extension and secure needle protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the injection-needle cover is designed with rigid segments connected by hinges, then the cover can protectively sheath the injection needle, but the cover fails to extend smoothly depending on needle size
Solution Approach 1:
The patent replaces rigid segmented structures with a flexible membrane structure that can smoothly envelop the injection needle. The flexible membrane includes a base portion, connected portion, and tip portion that can continuously deform and extend without the mechanical constraints of hinges, eliminating the problem of rough extension while maintaining protective function.
Solution Approach 2:
The patent introduces a dynamic flexible membrane structure that can adapt its shape and size during extension. The membrane transitions from a compressed state during injection to an extended protective state after injection, allowing smooth adaptation to different needle sizes without fixed rigid segments.
2Reliability
If the injection-needle cover cannot be extended smoothly, then the health practitioner is forced to handle the trouble, but this delays provision of care for the patient
Solution Approach 1:
The flexible membrane is pre-configured in a compressed state that automatically expands to the correct protective shape when needed. The membrane's elastic properties enable it to self-extend without requiring manual manipulation or adjustment by the health practitioner, eliminating time delays while maintaining protective reliability.
3Reliability
If the health practitioner tries to extend the injection-needle cover that cannot be extended smoothly, then it may cause an accident such as accidental needle stick, but this increases risk of infection for the health practitioner
Solution Approach 1:
The flexible membrane provides continuous coverage and smooth extension that eliminates mechanical snagging or sudden movements that could cause needle sticks. The membrane's flexibility allows it to conform to the needle without creating sharp edges or rigid structures that could injure the practitioner during extension.
4Ease of operation
If the injection-needle cover is designed to be easily extended, then the cover can be operated smoothly, but the structural complexity increases with multiple portions and hinges
Solution Approach 1:
The patent merges the base portion, connected portion, and tip portion into a single integrated flexible membrane structure. This unified design eliminates the need for separate rigid segments and hinges, reducing structural complexity while maintaining smooth extension capability through the membrane's inherent flexibility and elastic properties.
Data Source
AI summary
There is provided an injection-needle cover which is likely to be extended smoothly. The injection-needle cover 30 includes a base portion 32, a base hinges 34, a connected portion fitting space forming portion 36, a connecting hinge 38, and an injection needle enclosure portion 40. The injection needle enclosure portion 40 has paired base-side wall portions 60, a cylinder portion 62, paired tip-end-side wall portions 64, an injection needle contact portion 66, a hook portion 68, and a needle tip end fixing portion 70. The injection needle contact portion 66 is disposed at a position in a base-side axial space 80 which is a boundary between the base-side axial space 80 and an intra-cylinder space 82. The injection needle contact portion 66 has a force receiving portion 100 and a connecting portion 102. The force receiving portion 100 receives a force from the injection needle 24 when the force receiving portion 100 comes in contact with the injection needle 24. The force receiving portion 100 has an easy sliding portion 112. The easy sliding portion 112 is disposed in an area adjacent to an injection needle. The easy sliding portion slides more easily along the injection needle 24 than a case where an edge 114 slides along the injection needle 24.