{
    "component": "mini fan",
    "confidence": 0.95,
    "summary": "A compact desk fan with a motor-driven rotating blade assembly, wire cage, and plastic base.",
    "trigger": "power switch",
    "motion_sequence": [
      "power on",
      "blade rotation"
    ],
    "parts": [
      {
        "id": "rotor",
        "name": "blade assembly",
        "role": "rotating element",
        "geometry": {
          "shape": "cylinder",
          "size": [
            0.12,
            0.12,
            0.35
          ],
          "position": [
            0,
            0,
            0
          ]
        },
        "motion": {
          "type": "rotate",
          "axis": [
            0,
            0,
            1
          ],
          "speed": 2
        },
        "annotation": {
          "point": [
            0.5,
            0.5
          ],
          "label": "hub",
          "note": "central rotating hub"
        }
      },
      {
        "id": "cage",
        "name": "protective cage",
        "role": "static enclosure",
        "geometry": {
          "shape": "torus",
          "size": [
            0.55,
            0.55,
            0.04
          ],
          "position": [
            0,
            0,
            0
          ]
        },
        "motion": {
          "type": "static"
        },
        "annotation": {
          "point": [
            0.5,
            0.5
          ],
          "label": "cage",
          "note": "wire mesh surrounding blades"
        }
      },
      {
        "id": "base",
        "name": "stand",
        "role": "support",
        "geometry": {
          "shape": "box",
          "size": [
            0.45,
            0.25,
            0.2
          ],
          "position": [
            0,
            -0.15,
            0
          ]
        },
        "motion": {
          "type": "static"
        },
        "annotation": {
          "point": [
            0.5,
            0.85
          ],
          "label": "base",
          "note": "green plastic base"
        }
      }
    ]
  }