Wearable Biosensor Movable Sensor Unit for Comfortable Measurement
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Solution Overview
Problem
Conventional wrist-type electronic apparatuses face challenges in comfortably and securely attaching sensors to the user's body for biological information measurement, often requiring tight fitting or elastic bands, and lack efficient mechanisms to adjust sensor pressure.
Innovation Solution
The electronic apparatus includes a sensor unit, an outer case that supports the sensor unit in a movable upper/lower direction, and a pressing portion that changes the sensor unit's state between pressed and unpressed by rotating the sensor unit, allowing for adjustable attachment and release using a rotating body that moves the inner case relative to the outer case.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a tight fitting band is used to secure the sensor to the body, then measurement reliability is improved, but user comfort deteriorates
Solution Approach 1:
The sensor unit is designed to be movable relative to the body surface, transitioning between a first position (contacting the body) and a second position (retracted). This dynamic positioning allows the sensor to be pressed against the body during measurement for reliable data collection, then retracted during non-measurement periods to reduce user discomfort and irritation.
2Measurement precision
If the sensor is constantly pressed against the body, then measurement precision is improved, but user comfort deteriorates
Solution Approach 1:
The sensor unit operates in periodic cycles, being pressed against the body during measurement periods and retracted during non-measurement periods. This periodic action ensures that the sensor maintains contact with the body only when biological information needs to be collected, thereby ensuring measurement precision while minimizing skin irritation and user discomfort during non-measurement times.
3Adaptability or versatility
If a movable sensor mechanism is implemented, then adaptability is improved, but device complexity increases
Solution Approach 1:
The electronic apparatus is segmented into distinct functional components: an outer case, an inner case housing the sensor unit, and a pressing mechanism. This segmentation allows the sensor unit to be independently moved between contacting and retracted positions, providing adaptability for different measurement needs while keeping each component relatively simple in design.
Solution Approach 2:
The sensor unit is nested within the inner case, which itself is housed within the outer case. This nested structure allows the sensor unit to move between positions while remaining protected and integrated within the overall apparatus, achieving adjustable fitting without requiring complex external mechanisms.
Data Source
AI summary
To improve convenience in a wearable electronic apparatus that measures biological information. An electronic apparatus includes a sensor mechanism, a main body, and a retaining mechanism. The sensor mechanism acquires biological information of a user. The main body supports the sensor mechanism in a movable manner in an upper/lower direction. The retaining mechanism changes the sensor mechanism and the user's body between an unpress state and a press state by moving the sensor mechanism at the main body. With the electronic apparatus, a displacement of the sensor mechanism from the body is prevented and the maintenance of a contact condition is secured, an optical measurement becomes possible; therefore, it is thereby possible to improve convenience for a user without adjusting a position, etc.