Blood Pressure Monitor Pump Layout Vibration Isolation
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Solution Overview
Problem
Conventional blood pressure measurement devices face challenges in reducing size while minimizing the adverse effects of vibration and strain on the flow path due to the proximity of the vibration motor and operation unit, which affects the accuracy and reliability of measurements.
Innovation Solution
The device is designed with a unique layout where the on-off valve, pressure sensor, and packing are positioned on one side of the pump, with the pump housing portion and rib structure enhancing the base's strength, and the pump is fixed using double-sided adhesive tape to absorb vibrations and strains, thereby isolating the flow path from the drive unit's vibrations and operational strains.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the blood pressure measurement device is reduced in size, then the device becomes more compact and suitable for home use, but the flow path portion becomes closer to the vibration motor and operation unit, causing vibration and strain to adversely affect measurement accuracy
Solution Approach 1:
The device is divided into distinct functional zones: the drive unit (vibration motor and operation unit) is separated from the flow path portion by positioning components on opposite sides of the base. This spatial segmentation isolates vibration sources from sensitive measurement areas, allowing compact overall size while maintaining measurement precision through functional zoning.
2Volume of moving object
If the flow path portion is positioned close to the vibration motor and operation unit to reduce device size, then the device becomes more compact, but the vibration and strain from these components adversely affect the flow path portion
Solution Approach 1:
Packing material is introduced as an intermediary substance between the base and the flow path portion (including the pump). This packing layer absorbs and isolates vibration and strain transmitted from the drive unit, protecting the flow path components while allowing them to be positioned in a compact arrangement within the device housing.
3Device complexity
If the on-off valve and pressure sensor are positioned near the drive unit for compact layout, then the device structure becomes simpler, but the vibration and strain from the drive unit directly affect these sensitive components
Solution Approach 1:
The device employs asymmetric positioning of components: the drive unit (vibration motor and operation unit) is placed on one side of the base, while the on-off valve and pressure sensor are positioned on the opposite side. This asymmetric arrangement creates natural spatial separation between vibration sources and sensitive components, improving reliability without requiring complex isolation mechanisms.
Solution Approach 2:
Packing material serves as an intermediary layer between the base and components such as the on-off valve and pressure sensor. This packing absorbs vibration and strain from the drive unit before they reach these sensitive components, allowing them to be positioned in a compact asymmetric layout while maintaining performance stability.
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 effectively reduces the adverse effects of vibration and strain on the flow path, allowing for a compact design that maintains measurement accuracy and reliability, improving the overall performance of the blood pressure measurement device.
Implementation Method 1
the packing absorbs the vibration of the drive unit and the strain in the base
Implementation Method 2
the pump is fixed to the base by means of a double-sided adhesive tape. According to this aspect, the double-sided adhesive tape absorbs the vibration of the driving unit and the strain in the base
Data Source
AI summary
A blood pressure measurement device includes an outer case; a base; a pump provided on the base such that the pump is shifted from a center of the outer case and located on one side as viewed in a circumferential direction of a living body; a drive unit provided on the base and located on one side of the pump as viewed in a direction orthogonal to the circumferential direction; an on-off valve provided on another side of the pump as viewed in the direction orthogonal to the circumferential direction; a pressure sensor provided on said another side of the pump as viewed in the direction orthogonal to the circumferential direction; and packing provided between the on-off valve and the pressure sensor and the base.