Wearable Biosensor Housing Layout to Reduce Skin Pressure
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Solution Overview
Problem
Existing biological sensors cause discomfort such as itching and pain when attached to the skin due to pressure from connection portions during body movements.
Innovation Solution
The biological sensor design includes a first layer member with a housing and a second layer member, where connection portions are positioned at hard portions such as a housing to reduce pressure on the skin, using flexible materials to accommodate body movements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If connection portions are positioned at soft portions of the sensor, then ease of attachment is improved, but discomfort to the subject increases due to pressure during body movements
Solution Approach 1:
The patent applies local quality by positioning connection portions at hard portions (housing areas) rather than uniformly distributing them. This creates localized differences in the sensor structure where connection portions are strategically placed at rigid housing regions that can withstand pressure without causing discomfort, while other areas maintain softness for comfort. This resolves the contradiction by making different parts of the sensor serve different functions - hard portions for structural support and connection, soft portions for comfort.
2Object-affected harmful factors
If connection portions are positioned at hard portions of the sensor, then discomfort to the subject is reduced, but attachment stability may be compromised
Solution Approach 1:
The patent resolves the contradiction by transitioning from a two-dimensional plane to a three-dimensional structure. Connection portions are positioned at hard portions (housing) that extend in the thickness direction, creating a vertical dimension for attachment. This allows the connection portions to engage with the housing structure for stable attachment while the soft portions contact the skin for comfort, effectively separating the attachment function from the comfort function in different spatial dimensions.
3Adaptability or versatility
If the sensor uses flexible materials to accommodate body movements, then comfort is improved, but structural support for connection portions may be insufficient
Solution Approach 1:
The patent applies composite materials by combining flexible sensor portions with a rigid housing structure. The soft sensor material provides flexibility and comfort for accommodating body movements, while the hard housing provides structural support for connection portions. This composite structure resolves the contradiction by integrating materials with complementary properties - flexibility where comfort is needed and rigidity where structural support is required.
Data Source
AI summary
A biological sensor to be attached to a living body includes a sensor body configured to obtain biological information; an electrode connected to the sensor body; a first layer member including a housing that forms a housing space in which the sensor body is housed, the electrode being disposed on a lower surface of the first layer member; and a second layer member that is attached to the lower surface of the first layer member so as to expose the electrode and cover the sensor body. At least a part of a connection portion that is provided between the first layer member and the second layer member so as to overlap with a part of the electrode and connects the electrode to the sensor body is provided so as to be disposed in the housing in a plan view of the biological sensor.