| 摘要 |
A stair assistance device for assisting a person to climb up and down stairs comprises: a handle 2; a saddle 4 for engagement with a guide rail 10 mounted alongside the stairs, the saddle 4 being connected to the handle 2 and being arranged for sliding motion along the guide rail 10; a braking rail 8 for mounting alongside the stairs parallel to the guide rail 10; and a bracket 6 connected to the saddle 4, the bracket 6 being for selectively engaging with the braking rail 8 to prevent motion of the handle 2 and saddle 4 along the guide rail 10; wherein the bracket 6 and the braking rail 8 together form a releasable ratchet that, when engaged, prevents movement of the handle 2 in a downstairs direction and allows movement of the handle 2 in an upstairs direction; and wherein the handle 2 is coupled to the pawl 20 of the ratchet such that a predetermined movement of the handle 2 relative to the braking rail 8 will disengage the pawl 20 from the ratchet so that the handle 2 may move freely in both the upstairs and the downstairs direction. |
