Arm Sphygmomanometer Connector Structure for Airtight Stable Coupling
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Solution Overview
Problem
Existing upper arm blood pressure monitors face issues with airtight stability of male connectors, leading to inaccurate readings and risks of misconnection with other medical devices, which can result in incorrect treatments.
Innovation Solution
The design enhances the female connector of the upper arm blood pressure monitor with a gas manifold member, an embedded buckle, and a hermetic ring, ensuring stable engagement with the male connector and maintaining air sealing effectiveness, while adhering to international standards like ISO 80369-5.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the male connector structure is simplified for ease of connection, then the ease of operation is improved, but the airtight stability deteriorates leading to inaccurate readings
Solution Approach 1:
The connector system is divided into male and female connectors with distinct structural features. The male connector has a simplified insertion end for ease of operation, while the female connector contains the sealing mechanism and engagement features for reliability. This segmentation allows each part to be optimized for its specific function without compromising the other.
Solution Approach 2:
A sealing element (such as an O-ring or gasket) acts as an intermediary component between the male and female connectors. This intermediary ensures airtight stability while allowing the connectors themselves to maintain simple structures for ease of connection. The sealing element compensates for any minor dimensional variations and ensures reliable sealing.
2Ease of manufacture
If the connector design is simplified to reduce manufacturing complexity, then the ease of manufacture is improved, but the connection stability deteriorates allowing detachment
Solution Approach 1:
The female connector features an asymmetric engagement structure with positioning protrusions or keys that correspond to recesses in the male connector. This asymmetric design provides stable, directionally-controlled engagement while keeping the overall manufacturing process simple. The asymmetric features prevent misalignment and ensure proper mating without requiring complex manufacturing steps.
Solution Approach 2:
The connector design incorporates pre-formed engagement features such as positioning ribs, alignment guides, or pre-assembled sealing elements. These preliminary structural actions ensure stable connection from the moment of insertion, eliminating the need for complex assembly steps or additional stabilization mechanisms during manufacturing.
3Reliability
If the connector structure is made more complex to improve airtightness, then the reliability is improved, but the device complexity increases
Solution Approach 1:
A flexible sealing element (such as an elastomeric O-ring or lip seal) is used to achieve reliable airtightness. The flexibility of this thin film component allows it to conform to slight variations in connector dimensions and maintain sealing under varying pressure conditions. This approach achieves high reliability without requiring complex rigid sealing structures.
Solution Approach 2:
The design uses simple, easily replaceable sealing elements that can be manufactured at low cost. While these sealing components may have limited service lives, their simplicity and low cost allow for easy replacement rather than designing complex, durable sealing mechanisms. This maintains reliability while minimizing overall device complexity.
4Reliability
If the connector design is optimized for specific pull-out force requirements, then the reliability is improved, but the adaptability to different fields deteriorates
Solution Approach 1:
The connector design incorporates adjustable parameters such as the number and size of engagement ribs, the dimensions of positioning features, and the material properties of sealing elements. By varying these parameters, the same basic connector design can be adapted to meet different pull-out force requirements across various applications while maintaining the core structural simplicity and reliability.
Solution Approach 2:
The connector design follows standardized interfaces (such as ISO 80369-5) that allow the same basic design to serve multiple functions and applications. The universal design principles enable the connector to adapt to different fields and requirements through parameter adjustments rather than requiring completely different designs for each application.
Data Source
AI summary
The disclosure provides an arm-based sphygmomanometer which comprises: a measuring host, a female connector, and a male connector. The measuring host includes a housing, and the female connector is disposed within the housing. The female connector includes a gas manifold member, a hermetic ring disposed within the gas manifold member, and an embedded buckle also disposed within the gas manifold member. There is a deformable clearance between the embedded buckle and the hermetic ring. The embedded buckle includes a brim portion being an annular body and a crown portion extending from a periphery of the brim portion, wherein the crown portion includes a plurality of notches and the notches evenly divide the crown portion to correspondingly form a plurality of buckling pieces, and wherein a protrusion is formed on a foremost end of each of the buckling pieces. When the female connector and the male connector are tightly fit to and connected with each other, the protrusions of the embedded buckle correspondingly engage with an annular recess of the male connector.