| 摘要 |
PURPOSE:To prevent inclination of a movable block and short circuit of positive and negative conducting parts mounted on a power supply board by employing two power supply boards secured, respectively, to the opposite inner walls of a guide rail and sliding a brush on the two power supply boards while pressing at the outside of the movable block. CONSTITUTION:Two power supply boards 3A, 3B form insulating parts 3a, snaking perpendicularly in the longitudinal direction, while spacing vertically in the central part on one face of a planar board and the margin part of the insulating part 3a provides positive and negative potential conducting parts 3b, 3c. respectively, on the power supply boards 3A, 3B. Brush 5 in a mover block B is formed by bonding a contact to the outer center of a bent lief spring. In the operation, the mover block B is subjected to forces uniformly from the opposite sides of a pair of brushes 5, 5 and moves without inclining and since the power supply boards are separated from each other, short circuit due to adhesion of metal powder between the positive and negative conducting parts 3b, 3c can be prevented. |
