| 摘要 |
PURPOSE:To save a lead switch and to simplify a constitution, by a method wherein a magnet is mounted to one of objects which move relatively, and a lead switch, positioned along relative moving direction, and a lead switch, passing the center and crossing the moving direction at right angles, are attached to the other object. CONSTITUTION:A lead switch A, positioned of an arrow mark, and a lead switch B, passing the center and crossing the moving direction at right angles, are mounted to a stationary object 1. When a magnet 3 secured to the moving object 2 comes close to, the lead switch A first turns ON, and if the magnet 3 comes in the proximity of the center of the lead switch A, the lead switch B turns ON. At a center point position, only the lead switch A turns OFF, and with the movement of the magnet 3 away from the center point position, the A turns ON. the B turns OFF, and the A turns OFF. As a result, more positions than the number of the switches can be detected by means of less switches, and this causes saving of the lead switch, which results in simplifying a constitution. |
