| 摘要 |
PROBLEM TO BE SOLVED: To provide a bearing suppressing the generation of diffusion and scattering of conductive fluid, in the bearing conducting between a rotating member and a fixing member through the conductive fluid. SOLUTION: The conductive fluid 103 contacting with a small diameter portion 102a is diffused in an opening portion 106 direction due to getting wet and the like with the small diameter portion 102a surface, a large diameter portion 102b is provided in a position before the conductive fluid 103 reaches the opening portion 106, so that a creepage distance of a conducting pin 102 surface led to the opening portion 106 is decreased, and a recessed portion 101 is actually blocked by the large diameter portion 102b while leaving a minute clearance. Magnetic force generated by a magnet 104 acts on the conductive fluid 103 structured by magnetic material, and the conductive fluid 103 is pulled close to the magnet 104, so that the conductive fluid 103 is securely held in a recessed portion 101. Force diffusing the conductive fluid 103 is prevented, so that the conductive fluid 103 is prevented from diffusing or scattering from an opening portion of the recessed portion 101 to the outside. COPYRIGHT: (C)2003,JPO
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