Swallowing Sensor Board Stack for Lower-Cost Electrical Connection

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Solution Overview

Problem

Conventional swallowing sensor devices using rigid-flexible boards are costly due to expensive materials and complex assembly processes, necessitating a cost-effective manufacturing solution.

Innovation Solution

A swallowing sensor device is designed with a board group formed by stacking multiple rigid boards, where one part of the sensor unit is mounted on a first rigid board, another part on a second rigid board, and a third rigid board with through-holes for electrical connections, eliminating the need for flexible boards.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If rigid-flexible boards are used to connect sensor units on multiple rigid boards, then electrical connections between distributed sensor units are achieved, but material cost and assembly cost increase

Engineering Contradiction:
Improveelectrical connection reliabilityVSAvoidmanufacturing cost
Core Design Contradiction:
ReliabilityVSEase of manufacture

Solution Approach 1:

The invention divides the connection function into two separate components: rigid boards for structural support and sensor mounting, and flexible boards for electrical connection. This segmentation allows each component to be optimized independently, reducing overall manufacturing cost while maintaining connection reliability

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The flexible board acts as an intermediary element between the rigid boards, providing the necessary electrical connections without requiring the rigid boards themselves to be flexible. This mediator approach resolves the contradiction by allowing rigid structures to be connected through a flexible intermediary

Inventive Principle:
Principle #24Intermediary (Mediator)

2Volume of moving object

If sensor units are distributedly arranged on multiple rigid boards, then the sensor device achieves a compact size suitable for swallowing, but assembly complexity increases

Engineering Contradiction:
Improvesensor device sizeVSAvoidassembly process complexity
Core Design Contradiction:
Volume of moving objectVSDevice complexity

Solution Approach 1:

The invention employs a nested structure where multiple rigid boards with sensor units are stacked and connected by flexible boards in between. This nesting approach achieves compact volume by utilizing three-dimensional space efficiently while keeping the assembly process relatively simple through standardized connection interfaces

Inventive Principle:
Principle #7Nested doll (Nesting)

3Reliability

If rigid boards are folded and stacked by flexible boards, then sensor units are electrically connected, but bending processes increase assembly cost

Engineering Contradiction:
Improveelectrical connectionVSAvoidassembly cost
Core Design Contradiction:
ReliabilityVSEase of manufacture

Solution Approach 1:

The invention introduces dynamic flexibility through flexible boards that can bend and conform during assembly, allowing the rigid boards to be stacked in various configurations. This dynamic element enables reliable electrical connections while simplifying the assembly process compared to requiring rigid boards to be bent

Inventive Principle:
Principle #15Dynamics

Data Source

PatentUS12490930B2Swallowing sensor device and methods of manufacturing the same
Publication Date: 2025.12.09 TOHOKU UNIV
  • US12490930B2 patent drawing
  • US12490930B2 patent drawing
  • US12490930B2 patent drawing

AI summary

A swallowing sensor device includes a sensor unit comprising a sensor and a device that wirelessly transmits information detected by the sensor and a board group formed by stacking a plurality of rigid boards. The board group includes a fist rigid board on which one part of the sensor unit is mounted, a second rigid board on which other part of the sensor unit except for the one part of the sensor unit is mounted, and a third rigid board being disposed between the first rigid board and the second rigid board and comprising a through-hole drilled thereon, the through-hole being configured to electrically connecting the one part and the other part.