| 摘要 |
PURPOSE:To obtain dust proof efficiency for a slip ring and a brush in a small structure without using a special dust proof cover by housing the slip ring and the brush to supply an electric signal from the outside to a rotary part into an upper cylinder. CONSTITUTION:An upper cylinder 2 and a lower cylinder 1 are fixed, a rotary cylinder 3 mounted with a rotary magnetic head 10 is arranged between them, a slip ring 24 and a brush 28 are fixed, and they are housed inside the upper cylinder 2. That is, the brush 28 is held in a brush holder 29, the brush holder 29 is directly fixed inside the upper surface plate of the upper cylinder 2, and the slip ring 24 is provided at a central shaft 4 to support the rotary cylinder 3. Thus, the special dust proof cover is unnecessary, the dust proof effect for the slip ring and the brush can be obtained, and the cylinder device can be made smaller. |
