Biometric Patch Pad Structure with Dual Adhesive Zones
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Solution Overview
Problem
Healthcare devices that measure biometric information, such as heart conditions, face challenges with long-term attachment to the skin due to adhesion force durability, skin troubles, and moisture-induced adhesion deterioration, requiring innovative solutions for stable and pain-free attachment.
Innovation Solution
The electronic device incorporates a pad structure with a combination of dry and wet adhesive agents and a dehumidifying agent, along with a moisture sensor to maintain adhesion force and notify replacement, ensuring long-term attachment and bio-compatibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If a patch form health care device is directly attached to the user's skin for long-term monitoring, then continuous biometric data collection is enabled, but adhesion force deteriorates due to moisture and causes skin troubles
Solution Approach 1:
The adhesive portion is divided into multiple regions with different adhesive materials: a first region with a first adhesive material and a second region with a second adhesive material. This segmentation allows each region to perform its specialized function - one for initial attachment and another for maintaining adhesion in moist conditions.
Solution Approach 2:
Different regions of the adhesive portion are assigned different adhesive materials with specific properties tailored to their functions. The first adhesive material provides strong initial adhesion, while the second adhesive material maintains adhesion under moisture, creating local quality variations that solve the overall attachment problem.
2Duration of action of stationary object
If the adhesive strength is increased to ensure long-term attachment, then attachment durability is improved, but re-adhesion capability deteriorates
Solution Approach 1:
The adhesive materials are selected with specific parameter characteristics: the first adhesive material has high initial adhesion strength for durable attachment, while the second adhesive material has modified adhesion parameters that allow for easier detachment and re-adhesion, enabling repeated use.
3Device complexity
If a single adhesive material is used to simplify the structure, then device complexity is reduced, but adhesion performance under varying moisture conditions deteriorates
Solution Approach 1:
The adhesive portion uses a composite structure with two different adhesive materials in different regions. This composite approach combines the advantages of each material - one optimized for initial bonding and another for moisture resistance - achieving reliable adhesion performance across varying moisture conditions.
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
The solution provides stable attachment for extended periods, prevents skin troubles, and maintains adhesion even in varying moisture conditions, ensuring continuous biometric data collection without user discomfort.
Implementation Method 1
a first adhesive material in a first region having a first adhesive strength
Implementation Method 2
a second adhesive material in a second region abutting the first region, the second adhesive material being more hydrophilic than the first adhesive material and having a second adhesive strength in the presence of moisture greater than the first adhesive strength
Implementation Method 3
wherein the processor is configured to identify a need for replacement of the pad structure in response to the measured voltage indicating a threshold value
Data Source
Figure 1
Figure 2~3A
Figure 3B~3C
AI summary
An electronic device is provided. The electronic device includes a housing including at least one electronic component, and a pad structure coupled with the housing, and attached to a user body. The pad structure includes a first adhesive material having an adhesive strength at which the electronic device holds attachment in response to lack of existing water or humidity, and a second adhesive material abutting the first adhesive material and having an adhesive strength at which the electronic device holds the attachment in response to existing water or humidity.