Key Takeaways
Larger display with about 30% more screen area fitted into the existing platform
Four housing components consolidated into one
Wall thickness made uniform at about 3 mm
Housing weight reduced by about 8%
Platform functionality remained unchanged
Design for manufacturability applied to resolve legacy tooling limits
Quick Answer
A medical device maker wanted a larger display on its defibrillator because customer feedback said it would make the device easier to use in the field. A bigger screen needs a bigger cutout, and that change affects wall thickness, internal space, and the molds used to make the medical device housing. Goken redesigned the front housing around the new display, combined four housing components into one through medical device part consolidation, made the wall thickness uniform, and resolved the limits of the legacy tooling through design for manufacturability (DFM). The device kept the functionality that customers already trusted.
Context
The starting point was a working product. The defibrillator platform was already market proven, and the client wanted one change: a larger display. The client also set a firm limit. Performance, manufacturability, and quality had to stay where they were. The defibrillator housing redesign therefore focused on improving the enclosure while preserving the proven device platform.
Challenge
The larger display, about 30% more screen area, needed a larger cutout in the front housing, creating new requirements for medical device enclosure design.
The existing enclosure used four separate housing components, with manual modifications added over time, increasing assembly complexity and opportunities for tolerance stack up.
Wall thickness varied from about 2 mm to 4.5 mm across the housing, which added weight and made injection molded housing production less consistent.
Legacy tooling had been built around the smaller opening, which limited how far the defibrillator enclosure design could change without reworking the molds.
Approach
Impact assessment: Before changing any geometry, the team mapped how a larger display would affect wall thickness, internal clearance, structural ribs, seam lines, and tooling to support the medical device housing redesign.
Part consolidation: Four housing components were merged into one unified front housing. Each removed seam also removed one tolerance stack up from the assembly, simplifying medical device enclosure assembly.
Wall thickness standardization: Uniform walls make the molded part more consistent and lower the risk of warping and sink marks, improving design for manufacturability in the injection molding process.
DFM and DFA review: Tooling and molding limits were treated as design inputs from the first iteration, and assembly steps dropped as the part count dropped, supporting more efficient medical device manufacturing.
Protected the proven design: The internals and functionality of the platform stayed fixed, and the client engineering team reviewed the housing changes throughout the defibrillator housing redesign process.
Results
Area | Before | After |
Housing components | 4 | 1 |
Wall thickness | About 2 mm to 4.5 mm | Uniform, about 3 mm |
Housing weight | Baseline | About 8% lower |
Display screen area | Baseline | About 30% larger |
Platform functionality | Market proven | Unchanged |
The larger display fit within the existing platform, and the housing became simpler to mold and assemble. Fit and finish also improved, since fewer seams and uniform walls give a cleaner appearance. These medical device design optimization improvements helped balance display usability, enclosure quality, and manufacturability.
What This Reveals
A display upgrade is a housing decision. Wall thickness, molds, and assembly steps were all built around the old display size, so they all have to change together. Solving them in one medical device enclosure redesign pass avoids discovering the conflicts later on a production line. Integrating design for manufacturing and assembly (DFMA) considerations early helps engineering teams address tooling constraints and production requirements before manufacturing.
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