Biomedical Electrode With Embedded Conductive Wire
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Solution Overview
Problem
Biomedical electrodes with metallic portions can cause pain and discomfort due to rigidity, while those with conductive resin layers may experience noise generation and resistance variations during deformation, affecting wearing and measurement stability.
Innovation Solution
A biomedical electrode design featuring a conductive resin layer at the distal end of an elastic pillar portion, combined with a conductive wire internally connected from the distal end to the base, enhances flexibility and reduces noise and resistance variations, improving stability and comfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a metallic portion is used at the distal end of the pillar portion, then electrical conductivity is improved, but the subject feels pain or discomfort due to rigidity
Solution Approach 1:
The distal end of the pillar portion is formed with a composite structure combining a metallic portion (for electrical conductivity) and a flexible portion made of elastomer material (for comfort and followability). This composite design allows the electrode to maintain good electrical contact while reducing pain and discomfort during wear.
2Adaptability or versatility
If a conductive resin layer is used at the distal end of the pillar portion, then flexibility and followability are improved, but noise is generated due to disconnection during deformation
Solution Approach 1:
The pillar portion is constructed as a composite structure with an elastomer base material and embedded conductive wires. The conductive wires are linearly arranged within the elastomer from the distal end toward the base end, providing continuous electrical connection that prevents noise and signal instability during deformation while maintaining flexibility and followability.
3Area of stationary object
If a conductive resin layer is used at the distal end of the pillar portion, then contact area increases, but internal resistance varies caused by elongation and contraction
Solution Approach 1:
The electrode uses a composite structure where conductive wires are embedded within the elastomer material of the pillar portion. This configuration provides stable electrical connection that maintains consistent internal resistance during elongation and contraction, while the elastomer material ensures adequate contact area with the measurement target.
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 electrode achieves improved wearing and measurement stability by minimizing discomfort and noise, allowing for effective detection of bioelectrical signals such as brain waves, heartbeats, and muscular activity with reduced pain and increased durability.
Implementation Method 1
the contact area with the distal end increases such that the contact resistance can be reduced
Implementation Method 2
an elastic pillar portion; the followability to a measurement target is improved
Implementation Method 3
arranging a conductive wire in the pillar portion from a distal end side toward a base end side
Data Source
Figure 1A~1B
Figure 2A~2B
Figure 3A~3F
AI summary
A biomedical electrode of the present invention includes: a plate-shaped support portion; an elastic pillar portion that is provided on a first surface of the plate-shaped support portion; a conductive resin layer that is formed to cover a distal end of the elastic pillar portion; and a conductive wire that is electrically connected to the conductive resin layer and is arranged in the elastic pillar portion from a distal end side toward a base end side.