Handheld ECG Device with Orthogonal Flange for Signal Stability
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Solution Overview
Problem
Existing handheld electrocardiographic measurement devices face issues with user fatigue and decreased signal quality due to the need to hold the device with both hands for extended periods, leading to potential myoelectric noise and reduced S/N ratio.
Innovation Solution
A handheld device design featuring a spheroidal body with a stopper to restrict thumb position and a plate-shaped flange for electrode placement, allowing hands to support each other without touching, reducing fatigue and maintaining signal quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the device is held with both hands from the left and right sides, then electrocardiographic signal can be acquired, but the hands get tired and strain is applied to the hands and shoulders after long period measurement
Solution Approach 1:
The device is divided into two separate gripping portions: a main body portion gripped by one hand and a flange portion gripped by the other hand. This segmentation allows each hand to hold a different part of the device, distributing the holding burden and preventing fatigue while maintaining proper electrode contact.
2Volume of moving object
If the device size is reduced, then portability is improved, but both hands may touch each other during measurement which decreases the S/N ratio
Solution Approach 1:
The flange portion extends from the side surface of the main body in a direction substantially orthogonal to the axial direction. This dimensional extension creates spatial separation between the gripping portions, allowing hands to grip the device from different spatial locations without touching each other, even when the device is compact.
3Ease of operation
If the device is held while being clamped by thumbs and forefingers, then the device can be held, but strain is easily applied to the hands and myoelectric noise is easily included
Solution Approach 1:
The gripping portions are specifically designed with different characteristics: the main body portion has a shape suitable for palm or finger gripping, while the flange portion is designed for pinching with thumb and forefinger. This local differentiation of gripping qualities allows optimal hand positioning that minimizes strain and myoelectric noise generation.
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
Enables stable electrocardiographic signal measurement over long periods without user fatigue and minimizes myoelectric noise, while allowing simultaneous acquisition of pulse wave signals for enhanced biological information.
Implementation Method 1
a first electrocardiographic electrode disposed on a back side of the body to touch a finger of the one hand when the body is gripped with the one hand, and a second electrocardiographic electrode disposed on a surface of the flange to touch a finger of the other hand when the flange is pinched with the other hand
Data Source
AI summary
A handheld electrocardiographic measurement device includes a substantially spheroidal body, a stopper projecting along an axial direction of the body to restrict a position of a thumb of one hand by abutting on a side surface of the thumb when a user grips the body with the one hand, a plate-shaped flange projecting from a side surface of the body in a direction orthogonal or substantially orthogonal to a projecting direction of the stopper, a first electrocardiographic electrode disposed on a back side of the body to touch a finger of the one hand when the body is gripped with the one hand, and a second electrocardiographic electrode disposed on a surface of the flange to touch a finger of the other hand when the flange is pinched by the other hand.