handheld device 3d model

Create a parametric 3D model of a handheld mechanical device with the following specifications: 1. Outer Structure: * Cylindrical ergonomic body, approximately 140 mm in length and 40 mm in diameter * Split into two or more parts for assembly (snap-fit or screw-based closure) * Internal compartments for motor and battery housing * Integrated linear guide rails for a moving internal component 2. Internal Mechanism: * Linear reciprocating motion system using a crankshaft (crank-slider mechanism) * Small DC motor connected to an eccentric shaft * Internal component must move back and forth along the central axis * Stroke length between 10–20 mm * Include a low-friction sliding carriage 3. Moving Internal Component: * Smooth, rounded cylindrical shape * Attached to the sliding mechanism * Must remain aligned with the central axis during motion 4. Vibration Module: * Dedicated compartment at the base for an ERM (eccentric rotating mass) vibration motor * Positioned to transfer vibration to an external exte