Antenna Clip Retention for Precise IMD Header Placement
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Solution Overview
Problem
Implantable medical devices (IMDs) face challenges in maintaining consistent antenna placement within the header for proper performance, which is crucial for diagnostic and therapeutic functions, but existing solutions lack effective retention mechanisms during manufacturing and assembly.
Innovation Solution
An antenna clip with retention features such as channels, overhangs, cut-out portions, and resilient springs is used to position and retain the antenna relative to the header, ensuring consistent placement and preventing slippage during manufacturing and overmolding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the antenna is placed in the header without retention features, then the device complexity is reduced, but the manufacturing precision and reliability of antenna placement deteriorate
Solution Approach 1:
An antenna clip is introduced as an intermediary component between the antenna and the header. The clip includes a channel that receives the antenna and retention features (overhangs, protrusions) that secure it in place. This mediator enables precise antenna placement without requiring complex integrated retention structures in the header itself.
2Reliability
If retention features are added to the antenna clip, then the reliability of antenna retention is improved, but the device complexity increases
Solution Approach 1:
Retention features are applied locally at specific critical points within the antenna clip rather than throughout the entire structure. The clip includes selective retention features such as overhangs at the channel opening and protrusions at specific positions along the channel walls. This localized approach provides reliable antenna retention while minimizing the addition of overall device complexity.
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 antenna clip effectively retains the antenna within the header, facilitating easy assembly and preventing misplacement, thereby ensuring reliable performance of the IMD by maintaining consistent antenna positioning.
Implementation Method 1
The antenna clip can include a pair of resilient springs, comprising a first resilient spring extending at least partway over a channel in the antenna clip and a second resilient spring extending from an opposite side of the channel at least partway over the channel
Data Source
AI summary
An implantable medical device can include a housing including electronic devices within the housing, a header attached to the housing and including one or more bores, an antenna extending from the housing into the header, and an antenna clip configured to position and retain the antenna relative to the header.