| 摘要 |
<p>PROBLEM TO BE SOLVED: To display the centering of a rotary hub by marking a tooth of a counter wheel in a clock spring to be electrically connect the hub and a housing to be relatively moved to each other through a spiral ribbon cable. SOLUTION: A clock spring 10 comprises a housing 16, a hub 14 which is relatively turned to the housing 16, and a ribbon cable 58, etc., which is wound around the hub and electrically connect the housing 16 to the hub 14 through connectors 60,62 at each end. In addition, a counter wheel 84 is provided, the number of teeth of a gear 92 of the wheel 84 is equal to the maximum number of revolution of the hub, each tooth is marked, and the direction of rotation and the quantity of rotation of the hub 14 are easily and surely indicated in centering the hub 14 relative to the housing 16.</p> |
