pdf-page/gemma-4-e4b / tier-4-gp2y0a21yk

これは、提供されたデータシートの「Outline Dimensions」に基づいて、外部的な形状と主要なコンポーネントをモデリングしたものです。

センサー内部の光学部品や極小の電子回路部分は詳細度が不足しているため、外装ケース（ハウジング）として表現しています。座標系は要求通り、本体の中心が原点、取付面（PWB/コネクタ側）が -Z 方向です。

```openscad
// Sharp GP2Y0A21YK0F Sensor Housing Model
// Units: mm
// Orientation: Origin (0, 0, 0) at center. Mounting face is in the -Z direction.

unit = mm;

// --- Global Parameters & Dimensions (Based on datasheet approximations) ---
// Overall length along X-axis
L_TOTAL = 47.5; 
// Overall width along Y-axis
W_TOTAL = 29.5; 
// Height of the main body/housing (Z-height)
H_BODY = 18; 

// Connector dimensions (Bottom center feature)
CONN_L = 16.3;
CONN_W = 7.5;
CONN_H = 4; // Approximated height for mounting standoffs

// Emitter side (Left, X-min) and Detector side (Right, X-max) spacing
OFFSET_EMITTER = -20; // Approx start X coordinate of the emitter area
OFFSET_DETECTOR = 20; // Approx end X coordinate of the detector area


module main_housing() {
    // 1. Main Body Block (The encompassing structure)
    color([0.8, 0.8, 0.8])
    translate([0, 0, H_BODY/2])
    cube([L_TOTAL * 1.1, W_TOTAL + 5, H_BODY]); // Slightly oversized for fillet/tolerance

    // 2. Cut out the internal space (Creates the defined recess)
    difference() {
        // Start with the main body shape
        color("silver", 0.9) cube([L_TOTAL, W_TOTAL, H_BODY]);

        // Subtracting the connector mounting area/slot from the bottom center
        translate([0, 0, -1]) // Positioned slightly below the Z=0 plane
        cube([CONN_L, CONN_W, 2]);
    }
}


module emitter_assembly() {
    // Emitter Housing (Left Side)
    translate([OFFSET_EMITTER + L_TOTAL/2, 0, H_BODY/2])
    color("red", 0.8) // Representing the LED area
    cube([15, W_TOTAL * 0.7, H_BODY - 3]);

    // Emitter Details (Simulated component placement)
    translate([-15, 0, H_BODY/2 - 2])
    cylinder(h=4, r=2);
}


module detector_assembly() {
    // Detector Housing (Right Side)
    translate([OFFSET_DETECTOR - L_TOTAL/2, 0, H_BODY/2])
    color("blue", 0.8) // Representing the lens/detector area
    cube([15, W_TOTAL * 0.7, H_BODY - 3]);

    // Detector Lens (Simulated component placement)
    translate([15, 0, H_BODY/2])
    sphere(r=3);
}


module connector_block() {
    // The visible PCB Connector Block
    color("gray", 0.9)
    translate([0, 0, -CONN_H/2 + 1]) // Position slightly into the housing cavity
    cube([CONN_L, CONN_W, CONN_H]);

    // Simulated connection points (Pins)
    for (i = [-4, -2, 0, 2, 4]) {
        translate([i*5, 0, CONN_H/2-1.5])
        cylinder(h=3, r=1);
    }
}


// --- Assembly ---
module sensor_gp2y0a21yk0f() {
    // Main Housing (The primary chassis structure)
    main_housing();

    // Emitter side components
    emitter_assembly();

    // Detector side components
    detector_assembly();

    // Connector block attached to the bottom
    connector_block();
}

// Render the final model
sensor_gp2y0a21yk0f();
```