Microneedle Invasive Tip Structure for Depth Control and Impact Protection
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Solution Overview
Problem
Microneedles used in invasive high-frequency treatment devices are prone to damage and cause excessive pain and bleeding due to their fine diameter and susceptibility to impacts, as well as deep penetration issues.
Innovation Solution
An invasive tip with a mechanical structure featuring a housing with inclined side walls and a raisable bracket that limits microneedle penetration depth, a cap to protect needles from external forces, and a double substrate design with a buffer film for impact absorption and electrical insulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If microneedles with fine diameter are used to minimize pain and bleeding, then user comfort is improved, but needle durability deteriorates and they become easily broken or deformed
Solution Approach 1:
A buffer film is inserted between the first substrate and second substrate to absorb impacts before they reach the microneedles. This cushioning structure prevents the microneedles from being broken or deformed during transportation and storage while maintaining their fine diameter for minimal pain and bleeding during treatment.
2Productivity
If microneedles are inserted too deeply into the skin, then treatment effectiveness may increase, but pain and bleeding exceed expected levels
Solution Approach 1:
The housing is designed with an inclined surface that preliminarily determines and limits the maximum penetration depth of the microneedles before treatment begins. This preliminary structural constraint ensures that microneedles cannot insert too deeply into the skin, preventing excessive pain and bleeding while maintaining sufficient treatment effectiveness.
3Reliability
If a protective structure is added to protect microneedles from impacts, then needle durability is improved, but device complexity increases
Solution Approach 1:
The protective structure is designed as a nested configuration where the buffer film is inserted between substrates, and the housing with the inclined surface encompasses the entire needle array assembly. This nested design protects microneedles from impacts while maintaining a compact and relatively simple overall structure.
4Object-affected harmful factors
If a depth-limiting mechanical structure is added to prevent excessive penetration, then user safety is improved, but device complexity increases
Solution Approach 1:
The housing is designed with a localized inclined surface at the distal end that specifically addresses the depth-limiting function. This localized structural feature provides effective penetration depth control without requiring complex mechanical structures throughout the entire device, thereby improving user safety while minimizing increases in overall device complexity.
Data Source
AI summary
A high frequency output device and an invasive tip therefor are proposed, and the invasive tip includes a substrate, a needle array extending from a first surface of the substrate, one or more conductive pins extending from a second surface of the substrate, a bracket for supporting the substrate and guiding the one or more conductive pins, and a housing configured to accommodate the bracket inside thereof, have a plurality of through holes formed in a first end thereof opposite the first surface, and have a side wall formed to surround the needle array between the first end and a second end, the side wall having a shape of an inclined surface whose horizontal cross-sectional area decreases from a first point on the side wall to the first end, wherein the substrate includes wiring for electrically conductively connecting the one or more conductive pins to the needle array.