Brackets and mounts
Modular Bifold Wallet Chassis - 2 Panel Assembly
- Bounding box
- 163.0 × 83.0 × 12.0 mm
- Engine
- Precision B-rep
- Parameters
- 37
- Published
- October 21, 2026
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The prompt
Industrial 3D CAD engineering model of a 2-part modular internal chassis for a smart bifold wallet. Uniform 1.2mm base wall thickness, smooth 3.0mm filleted outer corners, and a matte polymer finish. Optimized for FDM 3D printing. Master Workspace Constraints: 163.0mm total open Width × 83.0mm Height. Composed of two independent flat rectangular plates separated by a strict 3.0mm empty air gap down the center hinge axis. 1. Left Panel / Electronics Hub (80.0mm × 83.0mm × 4.5mm max depth): • Recessed Component Cavity A (MCU/RFID/Charger Grid): Combined pocket measuring 48.0mm × 35.0mm × 3.5mm deep to house the Seeed Studio brain, charging circuit, and RFID module. • Recessed Component Cavity B (Battery Armor Enclosure): Isolated pocket measuring 31.5mm × 21.5mm × 4.2mm deep. Interior floors and corners must be perfectly smooth with a 0.5mm internal corner fillet. • Locking Anchor Integration: On the outermost left vertical edge, pre-model two 2.1mm diameter smooth through-holes spaced exactly 12.0mm apart vertically, centered on the edge. Add a 0.5mm deep rectangular counter-bore recess around the holes to flush-seat a steel catch loop plate. 2. Right Panel / Mechanical Node (80.0mm × 83.0mm × 12.0mm localized block depth): • Induction Pocket: On the bottom horizontal floor, generate a wide, shallow 45.0mm × 45.0mm × 1.2mm deep square indentation for a wireless charging coil. • Solenoid Mechanical Mounting Block: Extrude a solid housing block measuring 25.0mm × 15.0mm × 12.0mm total height located at the absolute outermost right vertical edge. • Internal Cavity & Fastener Holes: Inside this block, cut a precise, hollow cylindrical barrel cavity for a micro solenoid core. The barrel axis must face horizontally to the right. Cut two vertical 2.1mm diameter through-holes completely through the block and base plate flanking the barrel cavity, featuring a 4.0mm diameter, 1.5mm deep counter-bore on the bottom plate surface to hide M2 machine screw heads. Output as a unified coordinate assembly of two separate manifold solid bodies showing all internal feature pockets face-up.
Parameters
| Name | Value | Range |
|---|---|---|
| Panel Width | 80 mm | 40 – 120 |
| Panel Height | 83 mm | 40 – 140 |
| Panel Thickness (base wall + deepest cavity) | 5.4 mm | 3 – 12 |
| Center Hinge Air Gap | 3 mm | 1 – 10 |
| Outer Corner Fillet | 3 mm | 0.5 – 6 |
| Cavity A Width | 48 mm | 20 – 70 |
| Cavity A Height | 35 mm | 15 – 70 |
| Cavity A Depth | 3.5 mm | 1 – 8 |
| Cavity A Left Edge Margin | 6 mm | 2 – 25 |
| Cavity B Width | 31.5 mm | 12 – 50 |
| Cavity B Height | 21.5 mm | 10 – 45 |
| Cavity B Depth | 4.2 mm | 1 – 9 |
| Cavity B Left Edge Margin | 6 mm | 2 – 25 |
| Cavity B Bottom Margin | 7 mm | 2 – 30 |
| Divider Wall Between Cavities | 4 mm | 1.2 – 20 |
| Cavity B Internal Corner Fillet | 0.5 mm | 0 – 2 |
| Catch Loop Hole Diameter | 2.1 mm | 1 – 5 |
| Catch Hole Vertical Pitch | 12 mm | 5 – 30 |
| Catch Hole Pair Center (Y) | 0 mm | -20 – 20 |
| Counter-bore Seat Depth | 0.5 mm | 0.1 – 2 |
| Counter-bore Seat Length (Y) | 24 mm | 8 – 50 |
| Counter-bore Seat Height (Z) | 4 mm | 1.5 – 8 |
| Induction Coil Pocket Width (X) | 45 mm | 15 – 70 |
| Induction Coil Pocket Height (Y) | 45 mm | 15 – 75 |
| Induction Coil Pocket Depth | 1.2 mm | 0.4 – 3 |
| Pocket Center Offset (X) | -8 mm | -30 – 30 |
| Pocket Center Offset (Y) | 0 mm | -30 – 30 |
| Solenoid Block Length (X) | 25 mm | 10 – 45 |
| Solenoid Block Width (Y) | 15 mm | 8 – 35 |
| Solenoid Block Height (Z) | 12 mm | 5 – 25 |
| Solenoid Barrel Bore Diameter | 6 mm | 2 – 12 |
| Solenoid Barrel Bore Depth | 20 mm | 5 – 24 |
| Solenoid Barrel Axis Height (Z) | 7 mm | 2 – 20 |
| M2 Screw Hole Diameter | 2.1 mm | 1 – 4 |
| M2 Screw Hole Spacing (Y) | 10 mm | 4 – 14 |
| Screw Head Counter-bore Diameter | 4 mm | 2.2 – 8 |
| Screw Head Counter-bore Depth | 1.5 mm | 0.5 – 4 |
Every value above is a live dimension. Open a model like this in the editor and each one becomes a slider you can drag before exporting.
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