Biological Sensor Shield Frame for Current Isolation
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Solution Overview
Problem
Existing biological information measurement apparatuses face the risk of dangerous current flow from external devices into subjects during measurement, particularly when a terminal with wireless functionality is connected, necessitating countermeasures to prevent such occurrences while maintaining a simple configuration.
Innovation Solution
A biological information measurement apparatus with a shield frame that electrically connects the sensor and terminal internally, shielding the internal connections from external devices, thereby preventing current flow from external devices during measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a floating mechanism is used to prevent current flow from external devices, then safety is improved, but device complexity increases
Solution Approach 1:
The external contact is extracted and isolated within the shield frame structure, separating it from the internal sensor connections. This physical extraction prevents external devices from accessing internal circuits during measurement, achieving safety without requiring a floating mechanism.
Solution Approach 2:
The external contact is nested within the shield frame structure, which itself is integrated into the terminal housing. This nested arrangement allows the external contact to be contained and isolated within the terminal's own structure, eliminating the need for separate floating mechanism components.
2Reliability
If a shield frame structure is used to isolate external contacts, then safety is improved, but manufacturing complexity increases
Solution Approach 1:
The shield frame is merged with the terminal housing structure, combining the shielding function with the existing housing. This integration allows the shield frame to be formed as part of the terminal manufacturing process rather than as a separate component, reducing overall manufacturing complexity.
Solution Approach 2:
The shield frame serves multiple functions: it provides electromagnetic shielding, contains the external contact, and integrates with the terminal housing structure. This multi-functionality reduces the need for additional separate components, simplifying the overall manufacturing process.
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
This configuration reliably prevents current from external devices from flowing into the subject during biological information measurement, ensuring safety with a simple and effective design.
Implementation Method 1
the inside of the shield frame is shielded from the outside
Data Source
Figure 1
Figure 2
Figure 3A~3C
AI summary
In this biological information measurement device, the following are provided within a shield frame 315 in which the interior is shielded from the outside when attached to a sensor sheet 100: a terminal (a spring probe 312) that is connected to a sensor (an electrode 133) of the sensor sheet 100; and an external terminal (a USB terminal 313) for connection to an external device.