pdf-page/gemma-4-e4b / tier-4-gp2y0d413k

```openscad
// Sharp GP2Y0D413K0F Distance Sensor Housing Model
// Coordinate System: +Z = Up (Connector direction), +Y = Front/Lenses direction
// Units: mm

// --- Global Parameters & Tolerances ---
tolerance = 0.3; // Unspecified tolerance
pwb_thickness = 1.5; // Assumed thickness for PWB
case_material = "Carbonic ABS";

// ==============================================
// 1. Main Body Case (Housing)
// Based on overall dimensions, the case must encompass all components.
// Dimensions: Approx 56.3 (X length) x ~20 (Z height estimate based on components) x 17 (Y depth).
// We will model a slightly over-sized block to contain everything.
// ==============================================
module main_case(x_length, z_height, y_depth) {
    color([0.6, 0.6, 0.7]) cube([x_length, y_depth, z_height]); // Light blue/gray for ABS plastic
}

// ==============================================
// 2. PWB (Printed Circuit Board) and Connector Base
// Dimensions: L=39.4mm, W=16.3mm. Located near the bottom of the case.
// ==============================================
module pwbcase() {
    // A slight recess/base for mounting
    translate([0, -2, 0]) // Positioning slightly lower than main body floor (Z axis)
    cube([39.4, 16.3, pwb_thickness]);

    // Connector (Simplified representation of JCTC 12001W90-3P-HF)
    translate([0, -pwb_thickness*2, -5]) // Positioned on the edge of the PWB base
    cylinder(r=4, h=6, center=true);

    // Note: The main case should integrate around this. We assume the bottom part is cut out for mounting/access.
}

// ==============================================
// 3. Lens Assembly (Front Protrusion)
// This assembly extends along +Y from the main body face.
// ==============================================
module lens_assembly() {
    // General Housing Block for lenses
    translate([0, -5, 0]) // Positioned slightly in front of the main case plane
    cube([62, 15, 8]);

    // --- A. Emitter Lens (Circular, Left Side) ---
    // Center position: X approx -24.8 mm. Window size estimated (e.g., 7mm diameter).
    translate([-24.8, 0, 3]) // Positioned on the left side of the protrusion housing
    color([1, 0, 0, 0.5]) cylinder(r=7, h=6); // Redish semi-transparent window

    // --- B. Detector Lens (Rectangular, Right Side) ---
    // Center position: X approx 24.8 mm. Visible dimensions estimated (~10mm width, ~5mm height).
    translate([24.8, 0, 3]) // Positioned on the right side of the protrusion housing
    color([0, 0, 1, 0.5]) cube([10, 5, 1]); // Blueish semi-transparent window (Cube approximation)

    // Add a simple bezel/rim around the lenses for structural integrity
}


// ==============================================
// 4. Final Composition and Assembly
// Estimate dimensions to encompass all parts:
// X Max: ~30 mm (Detector side)
// X Min: ~-28 mm (Emitter side) -> Total Length L_X = 58 mm
// Y Depth: ~17 mm (PWB depth + protrusion length)
// Z Height: ~14 mm (Case height estimate)
// ==============================================

union() {
    // Main Body Case (The large outer shell)
    main_case(x_length = 58, z_height = 14, y_depth = 20);

    // PWB and Connector Base (Placed inside/on the bottom of the case)
    pwbcase();

    // Lens Assembly (Protrusion) - This structure is complexly integrated into the main case volume.
    lens_assembly();
}

```