| 摘要 |
PURPOSE: To eliminate returning failure of a conical inverting spring when the push of the conical inverting spring is released. CONSTITUTION: A conical inverting spring 5 connected to a fixed contact 3a and capable of inverting in the direction contacting with and separating from a movable contact 4a is arranged on a printed circuit board 2 on which the fixed contact 3a and the movable contact 4a are formed. The position 5c to be pushed of the inverting spring 5 is positioned in a slightly shifted place from the central part 5a to the outer circumference 5b of the inverting spring 5. A locking piece 6 protruding from the outer circumference 5b of the inverting spring 5 is inserted into a hole for positioning perforated in the printed circuit board 2 for locking, and the inverting spring 5 is positioned in the printed circuit board 2. |
