Diagram of Disassembled Components for an Improved Bronze Crossbow Mechanism Based on Ancient Designs

This technical diagram illustrates the individual components of a Bronze Crossbow Mechanism original: tong nuji (銅弩機). By the Ming Dynasty, many soldiers used simple triggers made of horn, but scholars like Mao Yuanyi advocated for a return to the more precise, durable bronze assemblies used during the Han Dynasty. The diagram shows how the internal parts—the hook, the trigger, and the levers—fit into a central bronze housing.

Housing The outer case that holds the internal components

Internal Lever Tip or linkage component Mechanism Spacer A shim used to ensure a tight fit within the housing

Pins Axles or bolts that secure the moving parts to the housing

Trigger Lever The part pulled by the finger to fire the bolt

Rear Sight Notch The "U-shaped" aiming guide discussed on the previous page Hook The "nut" or string-catch that holds the drawn bowstring