| 摘要 |
PURPOSE:To obtain a simple structure of ball chain which can be bent in a smaller bending by providing ball pieces between plural balls arranged in one line, and connecting the ball pieces with a movable connecting band provided with ball holes. CONSTITUTION:This ball chain 1 is composed of plural balls 8, ball pieces 2 provided between the balls 8, and a movable connecting band 3 which has ball holes 4... to connect the ball pieces 2. The ball pieces 2 are flat cylindrical members, and holding recesses 2a to hold the balls are provided on both end faces of each ball piece. The connecting band 3 is a thin plate-form member extending along the central axis 0 of the balls 8, and provided with a specific amount delta1 of deviation from the central axis 0. A holding margin by the ball piece 2 is set making the outer holding margin A to the central axis 0 larger than the inner holding margin B, so as to prevent falling out of the balls 8 to the outer side. |
