| 摘要 |
A head drum assembly for use in a VCR includes a rotary drum, a stationary drum, a motor assembly, and a plurality of piezoelectric bearings. The novel head drum assembly allows smooth rotation by using piezoelectric bearings in the appropriate bearing surfaces. In addition, the head assembly eliminates problems present in conventional head assemblies such as irregular rotation due to damaged ball bearings, lubricant contamination of the heads, and manufacturing difficulties due to the use of ball bearings and lubricant.
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