▎ 摘　　要

NOVELTY - The device has a main pipe cavity (11) whose one end is extended into an outer cylinder (16). The other end of the main pipe cavity is extended to the outside of a support base (2). Multiple evenly distributed rolling balls (17) are provided on the bottom surface of a support plate (14) that is faced away from an air column (15). The surrounding ring of the air column is provided with a number of evenly distributed L-shaped rods (18). The L-shaped rod is fixed on the support plate. The L-shaped rod is covered with a spring (19). One end of the L-shaped rod is set in contact with the interceptor plate. The interceptor plate is fixed on the outer cylinder. The L-shaped rod is penetrated an interceptor plate (20). USE - Spraying device for graphene anti-corrosion coatings for computer casings. ADVANTAGE - The device is realized the precise spraying work and is improved the quality of the computer shell processing. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the spraying device. Support base (2) Main pipe cavity (11) Support plate (14) Air column (15) Outer cylinder (16) Rolling ball (17) L-shaped rod (18) Spring (19) Interceptor plate (20)