Operation keyboard knob of frequency converter

The utility model discloses an operation keyboard knob of a frequency converter, which comprises an operation keyboard, an operation knob and a circuit board, and a knob shell is arranged on the uppersurface of the operation keyboard. Disclosed is an operation keyboard knob of a frequency converter. A groove, a convex block and a spring are arranged; when the operation knob is required to be controlled; the operation knob is pressed downwards; compression of its bottom spring, the convex block is pressed down along with the operation knob; the groove and the convex block are separated up anddown; at the moment, the operating knob can rotate leftwards and rightwards without resistance; determining rotation options, only the groove and the convex block need to be aligned and matched with each other; meanwhile, the operating knob is lifted and jacked up under the action of the spring, so that the operating knob is fixed, the operating knob is prevented from loosening or falling off (thebottom end of the operatin