Biometric Measurement Device with Casing Electrode for Stable Contact
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Solution Overview
Problem
Existing portable devices for measuring blood pressure and electrocardiographic waveforms often restrict user posture and can result in unstable contact surfaces due to limited electrode positions, leading to degraded waveform quality.
Innovation Solution
A biological information measurement device with a blood pressure measurement control unit, first and second electrodes, an electrocardiographic measurement control unit, and a main body portion that includes a casing with a side wall portion functioning as the first electrode, allowing for stable contact and improved waveform quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the electrode is provided only in a switch as in Patent Document 2, then the device structure is simplified, but the user's posture for measurement is limited and the contact state becomes unstable
Solution Approach 1:
The patent combines the electrode function with the casing side wall portion, merging two previously separate components (electrode and casing) into a unified structure. This allows the side wall to serve both as the housing boundary and as the electrocardiographic measurement electrode, eliminating the need for separate electrode components while ensuring stable contact during measurement.
Solution Approach 2:
The side wall portion of the casing is designed to perform multiple functions: it serves as the structural boundary of the device housing and simultaneously functions as the first electrode for electrocardiographic measurement. This multi-functionality reduces device complexity while maintaining measurement reliability.
2Device complexity
If the electrode position is limited, then the device structure is simplified, but the waveform quality degrades due to unstable contact surface
Solution Approach 1:
The electrode function is merged with the casing side wall, creating a stable, fixed contact surface that is integrated into the device structure. This eliminates the need for separate, potentially movable electrode components while ensuring consistent contact for high-quality waveform measurement.
Solution Approach 2:
The side wall portion is designed to provide a stable electrical potential reference by serving as the first electrode. The conductive material in the side wall creates a reliable equipotential surface that ensures consistent electrocardiographic measurements regardless of minor variations in user contact position.
3Adaptability or versatility
If the electrode is positioned to accommodate various user postures, then the measurement flexibility is improved, but the contact state may change during operation
Solution Approach 1:
By merging the electrode function with the casing side wall, the contact surface becomes an inherent part of the device structure rather than a separate component. This integration ensures that the contact state remains stable during operation even when the user adjusts their posture or operates buttons, as the side wall maintains constant contact with the user's body.
Data Source
AI summary
A technique for obtaining an electrocardiogram of good waveform quality. A biological information measurement device for measuring a blood pressure and an electrocardiographic waveform of a subject includes: a blood pressure measurement control unit configured to control measurement of a blood pressure of a measurement site of the subject; a first electrode to be in contact with a first site of the subject; a second electrode to be in contact with a second portion of the subject different from the first site; an electrocardiographic measurement control unit configured to control measurement of an electrocardiographic waveform of the subject through the first electrode and the second electrode; a main body portion including the blood pressure measurement control unit and the electrocardiographic measurement control unit; an instruction input portion operated by the subject to input an instruction; and a fixing portion configured to fix the main body portion to the measurement site.