| 摘要 |
A ladder 100 comprising a first assembly 102 having a pair of inner rails 101 and a pair of outer rails 105 with at least one rung coupled between the pair of inner rails. The pair of inner rails 101 are slidably coupled with the pair of outer rails 105, and at least one locking mechanism 104 coupled to an outer rail. The locking mechanism 104 includes a lever 152 and an engagement pin 150 coupled therewith. The lever 152 is located and configured to pivot relative to the outer rail such that, upon application of a force to a portion of the lever 152 in a first direction towards the outer rail, the engagement pin 150 is displaced in a direction that is different from the first direction. The lever 152 is further configured to be selectively positioned between a first position, where the engagement pin 150 engages an opening in a first inner rail of the pair of inner rails and is disposed at least partially within an opening defined by the at least one rung coupled with pair of inner rails, and, and a second position, where the engagement pin 150 is retracted from the opening of the first inner rail. A mechanism is configured to maintain the lever 152 in the second position until the application of a predetermined force to a second portion of the lever 152 in the first direction towards the first outer rail. |
