Biosensor Insertion Needle with Curved Connecting Sections
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Solution Overview
Problem
Conventional insertion needles for biosensors often result in apertures that are not smooth or too large, leading to delayed healing and increased risk of infection during implantation under the skin.
Innovation Solution
A specifically designed insertion needle structure formed by bending a flat blank, featuring a needle sharp and a needle body with non-parallel side walls, slope sections, and curved connecting sections, which creates a U-shaped cross-section to enhance smoothness and reduce piercing pain, while also incorporating reinforcing features like grooves or ribs for increased strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a conventional insertion needle is used, then the biosensor can be implanted under the skin, but the aperture formed is not smooth or too large, leading to delayed healing and increased infection risk
Solution Approach 1:
The insertion needle incorporates curved connecting sections that transition smoothly between the needle sharp, slope sections, and base wall. These curved geometry features eliminate sharp corners and create a smooth aperture pathway, reducing tissue damage and preventing burr formation that could lead to infection.
Solution Approach 2:
The needle body geometry is optimized by controlling the curvature radius of the connecting sections and the angles of the slope sections. By adjusting these geometric parameters, the aperture smoothness is improved while maintaining the structural integrity and piercing capability of the needle.
2Strength
If the insertion needle has a simple structure, then it is easy to manufacture, but it lacks sufficient anti-bending capability and insertion smoothness
Solution Approach 1:
The needle body is divided into distinct functional sections: base wall, slope sections, curved connecting sections, and needle sharp. Each section serves a specific purpose - the base wall provides structural support, the slope sections facilitate smooth tissue penetration, and the curved connecting sections ensure smooth aperture formation. This segmentation allows optimization of each part without excessive overall complexity.
Solution Approach 2:
The insertion needle is formed from a flat blank through bending, creating a composite structural form that combines flat sections with curved sections. This composite geometry provides both the required anti-bending capability and insertion smoothness without requiring additional reinforcement elements that would increase complexity.
3Manufacturing precision
If the side walls are parallel, then the needle body is simple to manufacture, but the aperture flatness and insertion smoothness are reduced
Solution Approach 1:
The needle body features non-parallel side walls with specific geometric relationships. The curved connecting sections create asymmetric transitions that optimize aperture flatness and insertion smoothness. This asymmetric design is achieved through controlled bending of a flat blank, maintaining manufacturing feasibility while improving performance.
Data Source
AI summary
An insertion needle structure includes a needle sharp and a needle body. The needle body is integrally connected to the needle sharp and has a receiving space for receiving the biosensor. The needle body includes a base wall, two side walls, two slope sections and two curved connecting sections. The side walls are located at two sides of the base wall, respectively, the side walls are at least partially nonparallel, and each of the side walls is at least partially flat. Each of the slope sections is connected between each of the side walls and the needle sharp, and each of the slope sections is curved. Each of the curved connecting sections is connected between each of the side walls and the base wall and between each of the slope sections and the base wall. The needle sharp extends from the base wall and the curved connecting sections.