tier-4-gp2y0d413k / gemini-3.8-flash

Sharp 製の測距センサ **GP2Y0D413K0F** の OpenSCAD モデルです。
データシートの寸法（外形 29.45 × 13.4 × 18.9 mm、レンズピッチ、コネクタ部など）に基づき、本体中心を原点、取付コネクタ側を -Z に向けてモデリングしています。

```openscad
// Sharp Distance Measuring Sensor GP2Y0D413K0F
// Unit: mm
// Origin: Center of main lens case
// -Z axis: Mounting surface / PWB & Connector side

$fn = 40;

// Dimensions from datasheet
W_CASE    = 29.45;  // Total width
H_CASE    = 13.05;  // Main case height
D_BASE    = 7.1;    // Case rear base depth
D_FRONT   = 6.3;    // Front lens housing depth (total front protrusion)
D_RIM     = 2.0;    // Front-most lens rim protrusion
H_TOTAL   = 18.9;   // Total height including connector
H_LENS_OUT= 8.4;    // Front housing height
H_LENS_IN = 7.2;    // Lens aperture height

// Center positions along X (Left edge is at X = -W_CASE/2)
X_EMITTER  = -W_CASE/2 + 4.5;   // *4.5 mm from left
X_DETECTOR = -W_CASE/2 + 19.7;  // *19.7 mm from left

// Front/Back Y coordinates (Origin Y=0 is center of total depth = D_BASE + D_FRONT = 13.4mm)
D_TOTAL   = D_BASE + D_FRONT;
Y_BACK    = -D_TOTAL / 2;               // -6.7 mm
Y_MID     = Y_BACK + D_BASE;            // +0.4 mm
Y_FRONT_M = Y_MID + (D_FRONT - D_RIM);  // +4.7 mm
Y_FRONT   = D_TOTAL / 2;                // +6.7 mm

// Colors
COLOR_CASE      = [0.15, 0.15, 0.15];   // Carbonic ABS (conductive black resin)
COLOR_LENS      = [0.20, 0.05, 0.10];   // Visible light cut-off acrylic resin
COLOR_PWB       = [0.60, 0.42, 0.20];   // Paper phenol (brown)
COLOR_CONNECTOR = [0.90, 0.90, 0.86];   // Connector body (natural / white)
COLOR_PIN       = [0.85, 0.75, 0.30];   // Brass / Gold plated pins

// --- Main Assembly ---
gp2y0d413k0f();

module gp2y0d413k0f() {
    main_case();
    lenses();
    pwb_and_connector();
}

// --- Main Case (Carbonic ABS) ---
module main_case() {
    color(COLOR_CASE) {
        difference() {
            union() {
                // 1. Rear Base Body
                translate([-W_CASE/2, Y_BACK, -H_CASE/2])
                    cube([W_CASE, D_BASE, H_CASE]);

                // 2. Middle Protrusion (Front housing base)
                translate([-W_CASE/2 + 2.5, Y_MID - 0.01, -H_LENS_OUT/2])
                    cube([W_CASE - 4.5, D_FRONT - D_RIM + 0.01, H_LENS_OUT]);

                // 3. Emitter Barrel (Left)
                hull() {
                    translate([X_EMITTER, Y_MID, 0])
                        rotate([-90, 0, 0])
                        cylinder(d = H_LENS_OUT, h = D_FRONT);
                }

                // 4. Detector Housing (Right oval shape)
                hull() {
                    translate([X_DETECTOR - 2.0, Y_MID, 0])
                        rotate([-90, 0, 0])
                        cylinder(d = H_LENS_OUT, h = D_FRONT);
                    translate([X_DETECTOR + 2.0, Y_MID, 0])
                        rotate([-90, 0, 0])
                        cylinder(d = H_LENS_OUT, h = D_FRONT);
                }
            }

            // Lens Aperture Cutouts
            // Emitter hole
            translate([X_EMITTER, Y_FRONT - D_RIM - 0.1, 0])
                rotate([-90, 0, 0])
                cylinder(d = H_LENS_IN, h = D_RIM + 0.2);

            // Detector hole (Oblong)
            hull() {
                translate([X_DETECTOR - 2.0, Y_FRONT - D_RIM - 0.1, 0])
                    rotate([-90, 0, 0])
                    cylinder(d = H_LENS_IN, h = D_RIM + 0.2);
                translate([X_DETECTOR + 2.0, Y_FRONT - D_RIM - 0.1, 0])
                    rotate([-90, 0, 0])
                    cylinder(d = H_LENS_IN, h = D_RIM + 0.2);
            }

            // Top decorative notch / step
            translate([-W_CASE/2 - 0.1, Y_BACK - 0.1, H_CASE/2 - 1.5])
                cube([W_CASE + 0.2, 1.8, 1.6]);
        }
    }
}

// --- Optical Lenses ---
module lenses() {
    color(COLOR_LENS) {
        // Emitter Lens (Spherical Convex)
        intersection() {
            translate([X_EMITTER, Y_FRONT - D_RIM + 0.5, 0])
                rotate([-90, 0, 0])
                cylinder(d = H_LENS_IN - 0.1, h = D_RIM);
            
            translate([X_EMITTER, Y_FRONT - 1.5, 0])
                sphere(d = 8.5);
        }

        // Detector Lens (Cylindrical / Oblong Convex)
        intersection() {
            hull() {
                translate([X_DETECTOR - 2.0, Y_FRONT - D_RIM + 0.5, 0])
                    rotate([-90, 0, 0])
                    cylinder(d = H_LENS_IN - 0.1, h = D_RIM);
                translate([X_DETECTOR + 2.0, Y_FRONT - D_RIM + 0.5, 0])
                    rotate([-90, 0, 0])
                    cylinder(d = H_LENS_IN - 0.1, h = D_RIM);
            }

            hull() {
                translate([X_DETECTOR - 2.0, Y_FRONT - 1.5, 0])
                    sphere(d = 8.5);
                translate([X_DETECTOR + 2.0, Y_FRONT - 1.5, 0])
                    sphere(d = 8.5);
            }
        }
    }
}

// --- PWB & Connector (-Z direction) ---
module pwb_and_connector() {
    pwb_thick = 1.2;
    pwb_w     = 24.0;
    pwb_h     = H_TOTAL - H_CASE; // 5.85 mm extension below case
    conn_w    = 10.1;
    conn_d    = 4.5;
    conn_h    = 5.5;

    // PWB
    color(COLOR_PWB) {
        translate([-pwb_w/2, Y_BACK + 2.2, -H_CASE/2 - pwb_h + 1.0])
            cube([pwb_w, pwb_thick, pwb_h - 1.0]);
    }

    // Connector Housing (JCTC 12001W90-3P-HF compatible)
    color(COLOR_CONNECTOR) {
        difference() {
            // Connector Body
            translate([-conn_w/2, Y_BACK + 0.2, -H_CASE/2 - pwb_h])
                cube([conn_w, conn_d, conn_h]);

            // Inner Cavity (faces downward / -Z)
            translate([-conn_w/2 + 0.8, Y_BACK + 0.8, -H_CASE/2 - pwb_h - 0.1])
                cube([conn_w - 1.6, conn_d - 1.6, conn_h - 1.0]);

            // Center Keyway notch
            translate([-0.6, Y_BACK - 0.1, -H_CASE/2 - pwb_h - 0.1])
                cube([1.2, 1.2, conn_h - 1.5]);
        }
    }

    // Metal Pins (3-pin: Vo, GND, Vcc)
    color(COLOR_PIN) {
        pin_pitch = 1.5;
        for (i = [-1:1]) {
            translate([i * pin_pitch, Y_BACK + 2.0, -H_CASE/2 - pwb_h + 0.5])
                cylinder(d = 0.5, h = conn_h - 1.2);
        }
    }
}
```