Blood Pressure Cuff Pump and Valve Orthogonal Layout
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Solution Overview
Problem
Conventional blood pressure measurement devices with integral cuff and device body configurations face challenges in minimizing case thickness due to the placement of valves, which increases the device's size and thickness, especially when valves are aligned with the battery or pump in the axial direction.
Innovation Solution
A blood pressure measurement device design featuring a cylindrical case with lugs, a pump positioned closer to the center, and valves placed orthogonally to the axial direction, along with a power supply unit separated from the pump by a gap, utilizes double-sided tape for fixation and air flow management to enhance cooling and prevent heat transfer, and strategically positioned suction holes for efficient airflow and cooling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the valve is placed in alignment with the battery or pump in the axial direction, then the flow path control function is achieved, but the case is thickened in the axial direction
Solution Approach 1:
The valve is repositioned from the axial direction to a position closer to one end of the outer case in the axial direction and closer to the circumferential direction, creating a two-dimensional layout that avoids axial overlap with the pump and battery, thereby reducing case thickness while maintaining flow path control functionality
Solution Approach 2:
The valve is positioned asymmetrically closer to one end of the outer case rather than at the center or in axial alignment, creating an uneven distribution of components that optimizes space utilization and reduces the maximum axial dimension of the case
2Ease of operation
If the valve is placed in the case, then the flow path control is enabled, but the case is increased in size
Solution Approach 1:
The valve positioning utilizes both axial and circumferential dimensions of the cylindrical case, placing it closer to one end in the axial direction and closer to the circumferential direction, which optimizes three-dimensional space utilization and reduces overall case volume
3Object-affected harmful factors
If the pump and power supply unit are spaced apart, then heat transfer from pump to power supply is prevented, but the case requires more axial space
Solution Approach 1:
The pump and power supply unit are positioned to be spaced apart in the circumferential direction rather than solely relying on axial spacing, creating lateral separation that prevents heat transfer while maintaining a compact axial profile
Solution Approach 2:
The pump is positioned asymmetrically closer to one end of the outer case in the axial direction, while the power supply unit is disposed alongside the windshield, creating an uneven spatial distribution that prevents thermal coupling between components
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 design allows for a thinner case profile by avoiding overlap between the pump and power supply unit, improving cooling efficiency, preventing power supply deterioration, and reducing air flow resistance, while maintaining effective operation and design aesthetics.
Implementation Method 1
a pair of lugs provided at each of positions symmetrical in a circumferential direction of an outer surface... the pump and the power supply unit are spaced apart from each other... disposed in the pump alongside the windshield in the axial direction of the outer case and opposed to the pump
Implementation Method 2
strategically positioned suction holes for efficient airflow and cooling
Data Source
AI summary
A blood pressure measurement device includes: a case including; a strap; a plurality of valves; a pump; and a power supply unit. The pump and the power supply unit are disposed with a gap therebetween. The pump is provided with a suction hole on a surface thereof opposite to the power supply unit. The device comprises a hole portion formed between each of a pairs of lugs of an outer case, an opening end being located at a position opposed to the gap in a first direction. The hole portion extends linearly, and one opening end of the hold portion is provided on the outer surface of the outer case closer to a wrist, and other opening end thereof is provided on the inner surface of the outer case closer to a windshield than the one opening end.