Enclosure¶

The enclosure (Gehäuse) is the 3D-printed body that holds everything together: the balloon and its nozzle, the display window, the card slot, and the pump/valve mounts.

Full assembly¶

The complete device body, all printed parts fitted together.

Overall size: ≈ 172 × 130 × 237 mm (width × depth × height).

Interior¶

Cutaway and partial views of the housing, showing how the card module, balloon adapter, and hose nozzle sit inside.

Assembly — front cut — Front cut — card module inside the cavity

Assembly — side cut — Side cut — the adapter and nozzle bore on the centre axis

Lower half from above — Lower half, from above — card module in the base

Upper half from below — Upper half, from below — nozzle and adapter passage

Parts¶

The housing splits into several printed parts plus one cut window. Each printed part has its own page with renders, dimensions, and CAD downloads:

Part	German name	Role
Upper housing	Gehäuse Oberteil	upper body shell — carries the display window and nozzle passage
Lower housing	Gehäuse Unterteil	lower body shell / base — houses the pump and valve
Roof	Dach-Spitze	top cap over the balloon nozzle
Hose nozzle	Schlauch-Stutzen	balloon nozzle mount (elbow + barbed fitting)
Balloon adapter	Ballon-Aufsatz	barbed balloon-neck adapter mounted on top of the upper housing
Card-module housing	Kartenmodul-Gehäuse	tray/shroud for the card slot and optical reader
Display window	Scheibe	polycarbonate pane — not printed

The pump and valve mount inside the lower housing; the display window is a polycarbonate pane fitted over the 7-segment display.

CAD files¶

Neutral-format CAD exports are committed to the repository:

Full-assembly STEP: full-assembly.stp
STEP (.stp, for CAD/CAM): hardware/enclosure/step/
STL (.stl, for slicing/printing): hardware/enclosure/stl/

The renders are reproducible

Every render on these pages is generated from the STL models by media/enclosure/render.py; render-all.sh regenerates the exact set. Requires Blender ≥ 4.2.