Blood Pressure Cuff Assembly With Hook-and-Loop Stability
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Solution Overview
Problem
Existing blood pressure measurement devices suffer from positional deviations between the curler and band, leading to reduced measurement accuracy and appearance issues due to the use of stretchable materials and potential sagging or wrinkling, especially when attached to the wrist.
Innovation Solution
The device integrates a band with the curler and fluid bag, using a hook-and-loop fastener to prevent positional deviations and ensure stable contact with the body, while the curler is made of a low-hardness material with a high-hardness insert for improved attachment and deformation, and a guide portion facilitates easy winding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If an easily stretchable material is used for the inner cloth of the cloth bag, then the air bag can bulge without restriction, but large sag or wrinkle is generated in the inner cloth, leading to deterioration in appearance
Solution Approach 1:
The patent introduces a sheet member as an intermediary layer between the inner cloth and outer cloth. This sheet member has high extensibility in the radial direction to allow air bag bulge while having low extensibility in the width direction to prevent sag and wrinkle formation, thus resolving the contradiction between adaptability and appearance
Solution Approach 2:
The sheet member is designed with anisotropic properties: high extensibility in the radial direction where bulge is needed, and low extensibility in the width direction where sag prevention is needed. This local differentiation of material properties resolves the contradiction
2Ease of manufacture
If the air bag and curler are not joined to the band, then manufacturing is simpler, but positional deviation occurs between the curler and band, reducing measurement accuracy
Solution Approach 1:
The patent merges the air bag and curler assembly with the band by making the air bag extend to the band's inner surface and the curler extend to the band's outer surface, creating an integrated structure that prevents positional deviation while maintaining manufacturing simplicity
Solution Approach 2:
The air bag and curler are extended in different dimensions: the air bag extends radially inward to the band's inner surface, while the curler extends radially outward to the band's outer surface, creating a three-dimensional integrated structure that eliminates positional deviation
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 design stabilizes blood pressure measurements by preventing positional deviations and sagging, maintaining high accuracy and a good appearance, even on wrists of varying sizes.
Implementation Method 1
a band provided integrally with an outer surface of the curler or the outer surface of the curler and an outer surface of the fluid bag and including a hook-and-loop fastener on an outer surface of the band
Implementation Method 2
the curler is made of a low-hardness material and includes a fixed portion fixed to the device body and into which a high-hardness material having a hardness higher than a hardness of the low-hardness material is inserted
Data Source
AI summary
A blood pressure measurement device includes a device body, a curler fixed to the device body, a fluid bag fixed to an inner surface of the curler and inflated by a fluid, and band provided integrally with an outer surface of the curler or the outer surface of the curler and an outer surface of the fluid bag and including a hook-and-loop fastener on an outer surface of the band.