| 摘要 |
A force-responsive sensor (5) is disclosed, such as for incorporation in a safety system for detecting an obstruction in a window opening closable by a motorised slidable window pane. The sensor (5) is mounted within a hollow volume (70) in flexible material (50A) running alongside the top frame member of the window opening. The sensor (5) comprises an upper flexible and resilient layer (10) supporting a continuous longitudinally extending conductive strip (14). This upper layer (10) is spaced from a similar layer (16) supporting a continuous longitudinally extending conductive strip (18), the two layers (10, 16) being separated from each other by insulating spacers (12A, 12B) spaced at intervals along the length of the sensor. Any obstruction in the window opening is carried upwardly by the rising window glass and applies a force (F) to the flexible material (50A). A ridge (71) in the lower wall of the hollow chamber (70) responds by causing contact between the two conductive strips (14, 18) to produce a warning signal. The construction is such that the sensor responds not only to a point force but also to a force applied over a substantial length of the window frame. |
