Isometric technical drawing of a mechanical pencil lead dispenser, showing internal components like lead storage, rotating disk, and pusher with labels.

A detailed isometric 3D engineering sketch of a compact desktop device that automatically inserts pencil leads into a mechanical pencil. The device is about the size of a pencil sharpener and shaped like a simple rectangular box with rounded edges. The top surface features a circular hole where a mechanical pencil is inserted vertically. One side of the box is cut away or transparent to reveal the internal mechanism clearly. Inside the device: - A funnel-shaped lead storage container at the top that collects multiple pencil leads - A rotating disk mechanism with a single precise slot that holds and releases exactly one lead at a time - A thin, spring-loaded pusher (piston) that gently pushes the lead forward into the pencil - Clear arrows indicating the motion: - A downward arrow showing pencil insertion - A circular arrow showing the rotation of the disk - A forward arrow indicating the lead being pushed forward by the pusher The style should be a professional technical drawing with clean, fine pencil lines, light shading for depth, grayscale only (no colors), minimalistic and clear for presentation or patent application use. The background should be white and uncluttered. Include labels for key components such as "Lead Storage", "Rotating Disk", and "Spring-loaded Pusher". Mehr sehen