A FILAMENT FEEDING MECHANISM FOR A 3D PRINTER HEAD

摘要

A filament feeding mechanism for a 3D printer head for selectively feeding filaments, comprising a motor wheel (1) for feeding filaments, and a set of pinch rollers (2, 3) mounted on a rocker arm (4). It further comprises a pushrod (8) connected to the rocker arm (4), and in that the rocker arm (4) is pivotably mounted with the axis of rotation (5) and adopted to rotate by lateral motion of pushrod (8) to press one of the pinch rollers (2, 3) to the respective filament.