Wrist Blood Pressure Cuff Layout for Rear Sensor Integration
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Solution Overview
Problem
Existing blood pressure measurement devices face challenges in maintaining measurement accuracy when sensors are disposed on the rear surface of the device body, as the removal of the cuff from this surface reduces the compression area, and air chambers on the rear surface hinder sensor placement.
Innovation Solution
A blood pressure measurement device is designed with a sensor unit on the rear surface, featuring first and second pressing cuffs that overlap and compress the wrist, allowing for accurate blood pressure measurement while accommodating sensors such as biometric and charging terminals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the cuff is removed from the rear surface of the device body to accommodate sensors, then the sensor placement is improved, but the compression area becomes small and measurement accuracy decreases
Solution Approach 1:
The patent transitions from a single-layer cuff design to a multi-layer configuration where pressing cuffs are positioned on the front surface and sensor units on the rear surface, utilizing the third dimension (depth/layering) to resolve the spatial conflict between compression and sensing functions
Solution Approach 2:
The cuff system is divided into functionally independent segments: pressing cuffs for compression on the front surface and sensor units for detection on the rear surface, allowing each segment to perform its specific function without interfering with the other
2Strength
If an air chamber is provided on the rear surface of the device body, then the structural support is improved, but sensor unit placement becomes difficult
Solution Approach 1:
The sensor unit is positioned on the rear surface in a location that does not conflict with the air chamber's position, utilizing different spatial zones on the rear surface to accommodate both structural and sensing requirements
Solution Approach 2:
The device body case acts as an intermediary structure that houses both the air chamber for structural support and provides mounting space for the sensor unit, mediating between the conflicting requirements of strength and sensor placement
3Area of stationary object
If the first pressing cuff and second pressing cuff are arranged to overlap on the wrist, then the compression coverage is improved, but the device complexity increases
Solution Approach 1:
The first and second pressing cuffs are fluidly connected and work together as a unified compression system, merging their functions to provide comprehensive wrist compression while sharing the same fluid supply from the pump
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 device maintains satisfactory measurement accuracy by ensuring the sensor unit is integrated into the device body, enhancing the arrangement freedom and functionality of biometric sensors and charging terminals, while preventing interference between cuffs and sensors.
Implementation Method 1
a pressure sensor
Implementation Method 2
a pump provided in the case
Data Source
AI summary
A blood pressure measurement device to be worn on a wrist by a band includes: a device body including a case, a pump provided in the case, a pressure sensor, a fluid circuit to be connected to the pump and the pressure sensor, and a sensor unit provided on a rear surface of the case facing toward the wrist; a first pressing cuff connected to the fluid circuit and fixed to one end of the rear surface of the case in one direction away from the sensor unit; and a second pressing cuff connected to the fluid circuit, fixed to the other end of the rear surface of the case in the one direction away from the sensor unit, and fluidly connected to the first pressing cuff. The first pressing cuff and the second pressing cuff are wound around the wrist by the band.