Medical Device Casing with Support Ribs and Low-Melt Fill
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Solution Overview
Problem
Existing medical devices with electronic components face challenges in packaging due to size, shape, biocompatibility, and protection from moisture, particularly in preventing warping of circuit boards during the insertion of fill materials.
Innovation Solution
A medical device design featuring a casing with internal structures to support the circuit board and a fill material with a lower melting temperature than the casing, allowing for secure insertion without warping, and an aperture for electrical connectors, while maintaining a durable and water-resistant outer surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fill material is inserted around the circuit board to provide protection and sealing, then moisture protection and biocompatibility are improved, but the circuit board may warp or bend during insertion
Solution Approach 1:
The casing includes support structures (such as support ribs or protrusions) that are pre-formed to hold the circuit board in a predetermined position before the fill material is inserted. This preliminary support prevents the circuit board from warping or bending during the subsequent fill material insertion process, thereby maintaining manufacturing precision while achieving moisture protection.
2Manufacturing precision
If the fill material is inserted at high temperature to ensure proper filling, then filling completeness is improved, but the casing material may melt or deform
Solution Approach 1:
The patent specifies that the fill material has a lower melting temperature than the casing material. This parameter difference allows the fill material to be inserted in a molten or softened state at temperatures that would deform the casing, while the casing remains structurally intact. The fill material then cools and solidifies to provide complete filling and sealing without compromising casing integrity.
3Manufacturing precision
If the circuit board is securely held in place during fill material insertion, then positioning accuracy is improved, but the complexity of the casing structure increases
Solution Approach 1:
The support structures within the casing are divided into discrete, modular elements such as individual support ribs, protrusions, or定位 features distributed at critical locations. This segmentation provides effective positioning and support for the circuit board without requiring a complex, monolithic support structure, thereby maintaining relatively simple casing design while achieving high positioning accuracy.
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 solution effectively prevents unwanted bending and warping of the circuit board during fill material insertion, provides a cost-effective, durable, and water-resistant outer surface, and facilitates tracking through visible markings, enhancing the manufacturing and functionality of medical devices.
Implementation Method 1
the fill material may be inserted around the circuit board without melting the casing
Implementation Method 2
A medical device design featuring a casing with internal structures to support the circuit board and a fill material with a lower melting temperature than the casing, allowing for secure insertion without warping
Data Source
AI summary
In some examples, a medical device may include circuitry on a circuit board, a casing, and a fill material at least partially within the casing. The casing may receive the circuit board and surround at least a portion of the circuit board. The casing may define an aperture configured to allow one or more electrical connectors of the circuit board to extend through the aperture for one or more electrical connections with one or more components outside of the casing. An outer surface of the casing may define a first portion of an outer surface of the medical device. The casing may comprise a material having a first melting temperature. The fill material may define a second portion of the outer surface of the medical device and may have a second melting temperature that is lower than the first melting temperature.