| 摘要 |
PROBLEM TO BE SOLVED: To improve the shock-resistant property of a pressure sensitive switch at a low cost by following such programs as the first film and the second film drop downward in the hole of a large opening as the result of the action of a strong pushing force to deform the first and the second films, those conductive layers make mutual contact, and switches are turned on. SOLUTION: The first lead tab and the second lead tab are exposed to the obverse surface side and to the reverse surface side of a pressure sensitive witch PSS respectively and a connector pin is jointed thereto. When the switch PSS is installed on the seat on a vehicle, if no person is sitting on the seat, since no pushing force is applied to the switch PSS, conductive layers 1d to 3d make no mutual contact in a hole 2d and switch off condition dominates between two tabs. When any person sits on the seat, a cover film 1 is deformed by the weight of the setting person and falls downward to the inside of the hole 2d of an insulating spacer 2 so that a conductive layer 1d on the lower surface of the film 1 may have contact with a conductive layer 3d on the upper surface of a support film 3. Thereby, the state of a gap between two lead tabs comes in contact (switch on). |
