| 摘要 |
PURPOSE:To extend the stroke of a spring and increase its displacement in which the peak of depressing force is generated, by forming its cross section into a folded zigzag shape. CONSTITUTION:A spring part made of rubber used for switches in which conductive rubbers are used as a contact is formed by parts 6, 7, 8, figured in an N-shape and patterned in a state of folded zigzag-like bellows. In this way, when a diameter at the bottom end of the part 6 is sufficiently near the inside diameter of a base part 1, the stroke of the spring is allowed to increase by the depression until a change of condition between both illustrated figures takes place, further the peak level of a depressing force is generated by the displacement after the increased stroke. Accordingly, when a snap action is present, the displacement for peak of a depressing force to be generated can be enlarged. |
