Insertion Guide Needle Geometry for Lower-Pain CGM Skin Entry

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Solution Overview

Problem

Conventional continuous glucose monitoring systems cause pain and discomfort during the skin insertion process of the sensor unit, leading to user repulsion and reduced convenience due to complex manufacturing processes and inadequate precision of the insertion guide needle.

Innovation Solution

A method for manufacturing an insertion guide needle through cut and bending processing of a needle original plate, forming a dot point tip for point-contacting with the skin and a continuous enlargement incision part to minimize pain and improve precision.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If conventional manufacturing processes are used for insertion guide needle, then manufacturing precision can be improved, but device complexity and manufacturing cost increase

Engineering Contradiction:

Improveprecision of insertion guide needleVSAvoidcomplexity of manufacturing process

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

The patent combines multiple manufacturing operations (cutting, bending, forming) into a single integrated stamping die process. The stamping die simultaneously performs cutting to create the dot point tip and bending to form the enlargement incision part, eliminating the need for separate manufacturing steps and reducing overall process complexity while maintaining precision

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The stamping die is designed to pre-form the dot point tip and enlargement incision part in a single preliminary operation. By preparing the needle original plate with the final geometric configuration directly during stamping, subsequent assembly and insertion processes are simplified, reducing overall manufacturing complexity

Inventive Principle:

Principle #10Preliminary action

2Ease of manufacture

If conventional insertion guide needle is used, then manufacturing process can be simplified, but manufacturing precision deteriorates

Engineering Contradiction:

Improveease of manufacturing processVSAvoidprecision of insertion guide needle

Core Design Contradiction:

Ease of manufactureVSManufacturing precision

Solution Approach 1:

The patent optimizes the geometric parameters of the needle original plate, including the angle and curvature of the enlargement incision part and the dimensions of the dot point tip. By carefully selecting these parameters, the stamping process achieves high precision in a single operation, maintaining manufacturing precision while simplifying the manufacturing process

Inventive Principle:

Principle #35Parameter changes

3Object-affected harmful factors

If point-contacting structure is used for skin insertion, then pain and repulsion can be minimized, but manufacturing complexity increases

Engineering Contradiction:

Improvepain during skin insertionVSAvoidcomplexity of needle structure

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The needle original plate is segmented into distinct functional zones: the dot point tip for initial skin penetration and the enlargement incision part for subsequent expansion. This segmentation allows each zone to perform its specific function optimally, minimizing pain through progressive insertion while the integrated stamping process keeps manufacturing complexity low

Inventive Principle:

Principle #1Segmentation

4Ease of operation

If enlargement incision part is added to minimize pain, then user comfort can be improved, but manufacturing process complexity increases

Engineering Contradiction:

Improveuser comfort during insertionVSAvoidcomplexity of manufacturing process

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The enlargement incision part is integrated into the needle original plate design and formed simultaneously with the dot point tip using a single stamping operation. This merging of features into one component manufactured in one process improves user comfort through progressive insertion while avoiding the need for separate manufacturing steps or assembly operations

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS12440125B2Method for manufacturing insertion guide needle for continuous blood glucose monitoring device

Publication Date: 2025.10.14 I SENS INC

AI summary

The present disclosure relates to a method for manufacturing an insertion guide needle for a continuous blood glucose monitoring device. The present disclosure provides a method for manufacturing an insertion guide needle for a continuous blood glucose monitoring device, by which: an insertion guide needle can be manufactured through a cutting process and a bending process of a needle raw plate, so that a complicated manufacturing process is unnecessary, and can thus be easily manufactured through a simple process; an enlargement incision part for continuous enlargement and incision, etc. can be conveniently manufactured through such a simple processing process, so that a manufacturing cost thereof can be reduced and also the size accuracy of the insertion guide needle can be improved; and, particularly, in a process of inserting the insertion guide needle into skin, the insertion guide needle can be brought into point contact with the skin to cut the skin, and then can continuously cut the skin in an enlarged manner, so as to minimize pains which may occur in the process of inserting the insertion guide needle into the skin, thereby alleviating the sense of repulsion or tension at the time of using the continuous blood glucose monitoring device.