Self-locking knob

The utility model discloses a self-locking knob. The self-locking knob comprises a knob cover and a knob shaft of which the inner end extends into an electric appliance shell; a tubular knob hole is formed at the inner surface of the knob cover; the knob hole sleeves the knob shaft from the outer end of the knob shaft; the self-locking knob further comprises a self-locking electric sheet; a portion of the knob shaft, which is not sleeved with the knob hole, is provided with a clamping groove; the outer end of the self-locking electric sheet is fixed on the inner surface of the knob cover; and the inner end of the self-locking electric sheet extends into the electric appliance shell and is clamped in the clamping groove so that the knob cover can be locked on the knob shaft. According to the self-locking knob of the utility model, the knob cover can be locked on the knob shaft through the self-locking electric sheet, so that the knob cover does not tend to fall off from the knob shaft, and therefore, the use e