Head drum assembly for use in a video cassette recorder

A video cassette recorder incorporating therein a head drum assembly, said assembly comprising:

• a stationary shaft;
• a rotary drum fitted around the shaft through a set of upper and lower bearing assemblies;
• a rotor transformer installed on the rotary drum;
• a transformer separation adjusting means, fitted around the shaft and provided with a stator transformer which is in a facing relationship with the rotor transformer, capable of being moved up and down in relation to the shaft to thereby adjust a separation between the rotor transformer and the stator transformer;
• a locking means for immobilizing the transformer separation adjusting means in relation to the shaft once the transformer separation means has been positioned around shaft so that the rotor and the stator transformers are provided with a predetermined separation;
• and
• a conical washer spring fitted around the shaft and interposed between the transformer separation means and the upper bearing assembly, the conical washer spring exerting a downward pressure on the upper bearing assembly, thereby preventing the upper bearing assembly from moving upwardly in relation to the shaft.