Blood Pressure Cuff Manufacturing via Bridge Welding
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Solution Overview
Problem
As the number of layers in blood pressure measurement cuffs increases, they tend to bulge laterally when inflated, preventing proper contact with the wrist, and the manufacturing process becomes more complex due to the need for welding multiple layers.
Innovation Solution
A method for manufacturing a cuff with six-layer bag-like structures, where bridge welding reduces the number of manufacturing processes by integrating intermediate layers and using an intermediate electrode to simplify the welding configuration, thereby preventing lateral bulging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the number of layers of cuffs increases, then the blood pressure measurement accuracy is improved, but the cuff bulges laterally when inflated, causing it to be unable to suitably press against the wrist
Solution Approach 1:
The cuff is divided into multiple independent bag-like structures (first bag, second bag, third bag) arranged in the longitudinal direction. Each bag can be inflated independently, allowing the cuff to apply pressure uniformly along the wrist without lateral bulging. This segmentation enables high measurement accuracy while maintaining proper contact shape.
Solution Approach 2:
Instead of increasing lateral width to improve contact, the invention adds layers in the longitudinal dimension (stacking bags along the length of the cuff). This dimensional transition allows more layers to be incorporated without increasing lateral bulging, as the bags are arranged sequentially along the longitudinal axis rather than expanding radially.
2Measurement precision
If the number of layers is added to achieve compact blood pressure measurement devices, then the measurement accuracy is improved, but the manufacturing process becomes more complex due to the need for welding multiple layers
Solution Approach 1:
The cuff is segmented into multiple bag-like structures that can be manufactured separately and then assembled. This segmentation allows each bag to be produced using standardized processes, and the assembly is simplified by pre-forming the bags before final welding, reducing overall manufacturing complexity.
Solution Approach 2:
The bag-like structures are pre-formed and prepared before the final welding assembly step. This preliminary formation of individual bags simplifies the subsequent welding process, as the components are ready-to-assembly rather than requiring complex in-process welding operations.
3Shape
If the cuff is designed with multiple bag-like structures, then the lateral bulging is prevented, but the number of welding processes increases when forming each layer
Solution Approach 1:
The cuff is divided into separate bag-like structures that are formed and prepared independently before final assembly. This segmentation allows for simplified welding processes, as each bag can be prepared in advance and then welded together in a more straightforward manner, improving manufacturing efficiency.
Solution Approach 2:
The bag-like structures are pre-formed and prepared before the final welding step. This preliminary action reduces the complexity of the welding process itself, as the components are ready for assembly rather than requiring complex real-time welding operations, thereby improving productivity.
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
The method reduces manufacturing complexity and prevents lateral bulging, ensuring the cuff maintains contact with the wrist during inflation while minimizing the number of welding processes.
Implementation Method 1
bridge welding together, each on the inside from an outer peripheral edge shape of the bag-like structures, the sheet member, facing the first intermediate layer, of the first outer layer and the sheet member, facing the first outer layer, of the bag-like structure, facing the first outer layer, of the first intermediate layer
Implementation Method 2
A blood pressure measurement device detects vibration of the artery wall to measure blood pressure by, for example, inflating and contracting a cuff wrapped around the upper arm or the wrist of a living body and detecting the pressure of the cuff using a pressure sensor
Data Source
AI summary
Provided is a method for manufacturing a cuff including a first outer layer, a first intermediate layer, a second intermediate layer, and a second outer layer, the method including disposing each of two non-bridge welded sheet members between the sheet member of the first intermediate layer bridge welded with the sheet member of the first outer layer and the sheet member of the first intermediate layer bridge welded with the sheet member of the second intermediate layer and between the sheet member of the second intermediate layer bridge welded with the sheet member of the first intermediate layer and the sheet member of the second intermediate layer bridge welded with the sheet member of the second outer layer, and welding the four sheet members constituting the intermediate layers.