| 摘要 |
A wheelchair is provided which has a seat height adjustment comprised of a in-line turnbuckle that allows infinite adjustment of the length of a turnbuckle assembly. The assembly includes a handgrip with a longitudinal recess having a first end with smaller internal threads that mate with the external threads of a smaller diameter cylinder. This cylinder can telescope with a recess formed in a second hollow cylinder having oppositely threaded external threads that mates with a second larger diameter set of threads in a second end of the longitudinal recess of the handgrip. The smaller diameter cylinder includes a snap button on a spring, which catches an annular shoulder on the recess formed at the transition between the smaller and the larger diameter areas. This inhibits the turnbuckle from over-extension. Further, the assembly has a restraint, which inhibits the turnbuckle assembly from working out of its selected position during use. The restraint can be pop detent or jam nut. The turnbuckle assembly is pivotally mounted at both ends in brackets, which are fastened respectively to a seat frame member and to a cross frame member. |
