Patent ID: 7510329

Claim:
A bearing unit comprising: an anti-shaft-release member at a distal end of a shaft, said anti-shaft-release member being configured to prevent said shaft from slipping in a thrusting direction; a radial bearing configured to rotatably support said shaft, said shaft being radially revolvable within said radial bearing; a space-forming member lid section covering a top surface of said radial bearing, a portion of said shaft extending from said radial bearing through a hole within said space-forming member lid section; a space-forming member main body surrounding a lateral surface of the radial bearing and a bottom surface of the radial bearing, a portion of said space-forming main member body contacting said radial bearing; a communication passage way configured to communicate said portion of said shaft with said distal end of said shaft, said communication passage way being a void extending along said top, lateral and bottom surfaces.