CGM Sensor Contact Assembly for Stable Skin-Attached Monitoring
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Solution Overview
Problem
Existing continuous glucose monitoring systems face challenges in usability and accuracy due to complex assembly processes and potential contamination, leading to increased defect rates and decreased measurement reliability.
Innovation Solution
A body-attachable unit with a sensor member and electrical contacts designed for easy assembly and operation, featuring a housing with a PCB substrate and sensor probe, and a pressing operation module to ensure stable contact between the sensor body part and electrical contacts, minimizing assembly complexity and contamination risks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a complex assembly process is used to ensure proper sensor contact, then measurement accuracy is improved, but manufacturing convenience deteriorates and product defect rate increases
Solution Approach 1:
The sensor body part is pre-formed with protrusions that correspond to recesses in the electrical contacts during manufacturing. This preliminary geometric preparation ensures that when the sensor is inserted, proper contact is automatically established without requiring complex assembly procedures or precision adjustment during manufacturing.
Solution Approach 2:
The electrical contacts are designed with differentiated structures: at least one contact has a first protrusion height while other contacts have second protrusion heights, creating segmented contact zones. This segmentation allows the sensor body part to make contact with all electrical contacts through a single insertion motion, simplifying the assembly process while ensuring reliable electrical connection.
2Volume of moving object
If electrical contacts are positioned close to the sensor body part, then device size is reduced, but manufacturing precision requirements increase leading to higher defect rates
Solution Approach 1:
The electrical contacts are designed with locally differentiated protrusion heights. The first electrical contact has a greater protrusion height than the second electrical contact, creating local variations in contact geometry. This local quality differentiation ensures reliable contact with the sensor body part while maintaining compact device dimensions, without requiring high manufacturing precision across all contacts.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enhances manufacturing convenience, reduces product defect rates, and improves glucose monitoring accuracy by simplifying the attachment process and preventing contamination, allowing for a disposable, non-reusable design.
Implementation Method 1
at least one of the plurality of electrical contacts is formed to make contact with the sensor body part to support the sensor body part
Data Source
Figure 1
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AI summary
Provided is a body-attachable unit configured to be attached to and inserted into a body for measuring biometric information, the body-attachable unit including a housing formed so that a bottom surface is configured to be attached to skin, a printed circuit board (PCB) substrate, which is disposed in the housing, with a plurality of electrical contacts formed to protrude from a surface of the PCB substrate, and a sensor member including a sensor body part disposed in the housing and a sensor probe part formed and extended from a side of the sensor body part to protrude outward from the bottom surface of the housing and configured to be inserted into the skin if the housing is attached to the skin, and at least one of the plurality of electrical contacts is formed to make contact with the sensor body part to support the sensor body part, remaining of the plurality of electrical contacts are formed to be spaced apart from the sensor body part, and the sensor body part is to make contact with all of the plurality of electrical contacts by manipulation by a user.