Blood Pressure Cuff Inversion for Self-Attachment
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Solution Overview
Problem
Conventional blood pressure measurement cuffs, such as the fold-back type, require unnatural operations for attachment, making it difficult for individuals to attach them independently, especially for those with limited dexterity or strength.
Innovation Solution
A blood pressure measurement cuff with a belt-shaped body wrapped in one direction around the measurement site, featuring a ring with a temporary fastening structure that allows easy attachment by eliminating the need for unnatural movements, using a hook-and-loop fastener and a sleeve member that pivots to apply friction and prevent slippage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fold-back type cuff is used with hook-and-loop fastener, then the cuff can be securely fastened, but the attachment operation becomes unnatural and difficult for self-attachment
Solution Approach 1:
The invention inverts the conventional attachment sequence by first wrapping the cuff around the arm and then pulling the leading end through the fold-back fitting from the inside outward, rather than folding back first and then fastening. This inversion makes the attachment operation natural and intuitive while maintaining secure fastening through the hook-and-loop fastener.
Solution Approach 2:
The invention performs preliminary wrapping of the cuff around the arm before final fastening. The user first wraps the cuff in the circumferential direction, positions it correctly on the arm, and then pulls the leading end through the fold-back fitting to engage the hook-and-loop fastener. This preliminary wrapping action simplifies the overall attachment process and makes it suitable for self-attachment.
2Reliability
If the leading end is pulled laterally to eliminate gaps, then the cuff fits tightly, but the operation becomes unnatural and requires maintaining tensile force
Solution Approach 1:
Instead of pulling the leading end laterally from the outside, the invention pulls it through the fold-back fitting from the inside outward. This inverted pulling direction eliminates the need to maintain continuous tensile force and makes the operation natural and easy to perform for self-attachment.
Solution Approach 2:
The fold-back fitting acts as an intermediary mechanism that converts the pulling motion into effective tensioning. By pulling the leading end through the fold-back fitting, the user eliminates gaps between the cuff and arm in a natural motion without needing to maintain continuous tensile force on the cuff material itself.
3Reliability
If the cuff is folded back for fastening, then the hook-and-loop fastener can be engaged, but unnatural folding operation is required
Solution Approach 1:
The invention inverts the conventional approach by not folding back the cuff at all. Instead, the leading end is pulled through the fold-back fitting from the inside outward, allowing the hook-and-loop fastener to be engaged in a natural pulling motion without any folding operation.
Solution Approach 2:
The invention extracts the folding operation from the attachment process entirely. By pulling the leading end through the fold-back fitting and engaging the hook-and-loop fastener in a single continuous motion, the complex folding maneuver is eliminated, making the attachment process simple and suitable for self-attachment.
4Ease of manufacture
If conventional cuff design is used, then manufacturing is simple, but attachment requires skill and is not suitable for self-use
Solution Approach 1:
The invention inverts the attachment sequence to make it natural and intuitive for self-attachment while maintaining simple construction. The cuff is wrapped first, then the leading end is pulled through the fold-back fitting from the inside outward to engage the fastener, eliminating the need for skillful folding operations.
Solution Approach 2:
The invention enables self-service attachment by making the attachment operation intuitive and easy to perform. The wrapped-cuff-then-pull-through design allows users to attach the cuff to their own arm without assistance or special skills, while the construction remains simple and suitable for mass production.
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
Enables easy self-attachment of the cuff without requiring unnatural operations, improving accessibility for individuals with limited dexterity or strength, and allows for efficient pressurization with reduced material costs and expanded dimensions for better fit and comfort.
Implementation Method 1
a second region that, when the sleeve member pivots around the second side due to the belt-shaped body, applies friction to the outer cloth
Data Source
AI summary
A blood pressure measurement cuff includes a belt-shaped body and a ring having a temporary fastening structure that allows a region continuous with the outer circumferential end of the belt-shaped body to be pulled through the ring away from the measurement site during attachment and suppresses a case in which the region continuous with the outer circumferential end of the belt-shaped body is pulled back through the ring by elastic force of the measurement site. The temporary fastening structure includes a sleeve member fitted around a second side of the ring for pivoting around the second side. The sleeve member includes a first region that allows the outer cloth to slide and a second region having a projection that applies friction to the outer cloth in that order from an upstream side toward a downstream side with respect to a direction in which the belt-shaped body is pulled.