Disposable depth-adjustable injector for medical cosmetology

The utility model discloses a disposable depth-adjustable injector for medical cosmetology, and relates to the technical field of medical cosmetology. The injector comprises a needle head, a piston, acylinder, a sleeve and a sleeve cover, a first threaded protrusion is fixed to the peripheral side face of the cylinder, a first graduated scale is fixed to the peripheral side face of the cylinder,and a needle opening is fixed to one end of the cylinder. A bolt penetrates through the peripheral side face of the sleeve, and a second graduated scale is fixed to the peripheral side face of the sleeve. According to the utility model, the first threaded bulge and the first threaded groove are arranged; rotary cylinder, sleeve cover, the sleeve is fixed by screwing the bolt, the needle head partis located in the sleeve cover again by arranging the second threaded protrusion and the second threaded groove and rotating the sleeve cover, the purpose of finely adjusting the depth of the needle head is achieved, and the de