| 摘要 |
The device includes a cylindrical block (1) fixed (4) to the vehicle floor-plate e.g. under a front seat, which has a vertical bore into which the obstructing leg (5) is lowered (10) till it rests either on the ground or in a prepared recess. A lockable plug (6) within the leg, when depressed, forces down a chisel point (7) that drives two transverse stops (8) sideways into an encircling groove (2) within the cylinder. These stops, immobilising the leg, return under spring pressure (9) when the plug is released, freeing the leg. A pressure switch (11), detecting the presence or absence of the leg, operates a dashboard warning light. Optionally the leg is immobilised by balls displaced radially by a waisted block. |
