EEG Electrode Retractable Pin Mechanism for Scalp Pressure Control
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Solution Overview
Problem
Current EEG headsets face challenges in comfortably and effectively capturing neural signals due to the rigidity and pressure of traditional electrode designs, which can lead to discomfort and interference from noise.
Innovation Solution
The development of EEG headsets with removably coupled electrode units featuring retractable pins and adjustable mechanisms, including springs and flexible arm designs, to reduce pressure and enhance signal quality by minimizing noise interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If traditional rigid electrode designs are used, then structural stability is improved, but user comfort deteriorates due to excessive pressure
Solution Approach 1:
The electrode assembly incorporates a retractable pin mechanism that transitions from an extended state (providing stable contact) to a retracted state (reducing pressure). The pin can be dynamically adjusted between extended and retracted positions, allowing the system to adapt between structural stability and user comfort based on operational needs
Solution Approach 2:
The contact pressure parameter is changed by retracting the pin into the electrode body, reducing the force applied to the scalp. This parameter change allows the electrode to maintain stable electrical contact while minimizing discomfort to the user
2Measurement precision
If traditional electrode designs are used, then signal capture is improved, but noise interference worsens
Solution Approach 1:
The harmful factor of noise interference is extracted and isolated from the signal capture process through the use of a retractable pin design. By retracting the pin, the electrode minimizes contact with external noise sources while maintaining sufficient contact for signal acquisition, effectively separating the signal capture function from noise exposure
Solution Approach 2:
The retractable pin acts as an intermediary between the electrode body and the scalp, mediating the balance between signal capture and noise reduction. The pin can be extended to optimize signal contact or retracted to reduce noise interference, serving as a controllable interface that manages the trade-off between these two opposing requirements
3Reliability
If fixed pressure electrodes are used, then contact stability is improved, but discomfort increases
Solution Approach 1:
The electrode employs a dynamic pressure adjustment mechanism through the retractable pin, allowing contact pressure to be varied between extended (stable contact) and retracted (reduced pressure) states. This dynamic adjustment maintains reliability when needed while reducing discomfort during extended wear
Solution Approach 2:
The retractable pin design provides preliminary anti-action against discomfort by allowing the electrode to preemptively reduce pressure before significant discomfort occurs. The user or system can retract the pin to prevent discomfort while maintaining sufficient contact for reliable signal acquisition
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 a more comfortable fit and improved signal capture by reducing electrode pressure and shielding against noise, enhancing the overall performance and user experience of EEG data collection.
Implementation Method 1
an electrode body and a pin that is retractable into the electrode body. In some such examples, the pin is biased outward via a spring
Implementation Method 2
EEG data is typically measured using a plurality of electrodes placed on the scalp of a user to measure voltage fluctuations
Data Source
AI summary
Example headsets and electrodes are described herein. Example electrode units described herein include a housing having a cavity defined by an opening in a side of the housing and an electrode. In some such examples, the electrode includes a ring disposed in the opening and an arm, where the arm has a first portion extending outward from the opening away from the housing and a second portion extending from an end of the first portion toward the housing and into the cavity, and the first and second portions connect at a bend.