Wrist Blood Pressure Cuff Integration for Displacement Control
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Solution Overview
Problem
Blood pressure measurement devices worn on the wrist face accuracy issues due to relative displacement of the cuff and belt, leading to inadequate cuff pressure against the wrist, which reduces measurement accuracy.
Innovation Solution
A blood pressure measurement device design where the cuff is accommodated in a bag-shaped belt with a connecting portion that ensures the cuff remains pressed against the wrist, even when the cuff moves axially, by being fluidly connected to a pump and having a flexible attachment mechanism that allows easy attachment and detachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the cuff and belt are separate bodies, then the ease of manufacture and assembly is improved, but the measurement precision deteriorates due to relative displacement between cuff and belt
Solution Approach 1:
The patent merges the cuff and belt into a single integrated structure where the cuff is embedded within the belt body. This integration eliminates relative displacement between the cuff and belt during wrist movement, ensuring measurement precision while maintaining manufacturability through modular assembly processes.
Solution Approach 2:
The cuff is nested within the belt structure, with the cuff positioned inside a dedicated compartment or channel in the belt. This nesting arrangement ensures the cuff remains properly positioned relative to the belt during wrist movement, preventing displacement while allowing separate manufacturing of the cuff and belt components.
2Measurement precision
If the cuff is firmly fixed to the belt, then the measurement precision is improved by preventing displacement, but the ease of operation deteriorates due to difficulty in attachment and detachment
Solution Approach 1:
The patent employs a dynamic fastening mechanism that transitions between locked and unlocked states. During normal use, the cuff is securely fixed to prevent displacement. During attachment and detachment operations, the fastening mechanism can be easily actuated to release or secure the cuff, providing both stability and operational ease.
Solution Approach 2:
An intermediary fastening component is introduced between the cuff and belt, serving as a mediator that provides secure fixation during measurement while allowing easy release when needed. This intermediary element decouples the permanent fixation requirement from the temporary attachment operation.
3Ease of operation
If the attachment portion is made long to reach the connecting portion, then the ease of operation is improved by allowing greater movement, but the device complexity increases due to additional structural requirements
Solution Approach 1:
The patent resolves the length issue by changing the spatial arrangement from a linear extension to a three-dimensional routing path. The attachment portion utilizes the depth and width dimensions of the belt structure to connect to the connecting portion, avoiding the need for excessive length in a single direction while maintaining operational flexibility.
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 enhances the accuracy of blood pressure measurements by maintaining consistent cuff pressure against the wrist and improves wearability and ease of use.
Implementation Method 1
a pump (14) which is accommodated in the case body (33) and is fluidly continuous with the connected portion (38)
Data Source
AI summary
A blood pressure measurement device includes a cuff structure including a connecting portion provided at a portion facing a wrist side of a case, the connecting portion being connected to a connected portion of the case, a belt body including a bag body formed with a hole disposed with the connecting portion on one end side in a longitudinal direction at a portion facing the connected portion in a state where the cuff structure is disposed inside the bag body, and an attachment portion including one end portion fixed on the one end side of the bag body and the other end side from the hole of the bag body, and the other end portion attached to an attached portion, the attachment portion having a length from the one end portion to the attached portion shorter than a length from the one end portion to the connecting portion.