| 摘要 |
A telescopically collapsible step ladder (10) comprises two legs (12,14) each having rungs (12a-e, 14a-c). The legs (12,14) are hinged together, and each is formed of telescopically collapsible sections having latch mechanisms in each of the rungs (12a-e, 14a-c) for automatically locking the sections in a leg (12 or 14) when the leg is extended. The latch mechanisms in each rung (12a-e, 14a-c) are designed to release the next high section above a rung (12a-e, 14a-c) when said rung is collapsed against the rung immediately below it. The separation of the rungs (14a-c) on one of the legs (14) when the ladder is extended is greater than that of the rungs (12a-e) on the other leg (12). A further collapsible extension (22) may be provided projecting above the hinge (16) between the legs (12a-e, 14a-c), to which may be fitted a tray (24). |
