| 摘要 |
A height adjustment assembly includes a joint having a through hole defined therethrough, a tube insertable through the through hole, at least one clamping plate with one distal end thereof pivotally connected to the joint to securely engage with an outer periphery of the tube and an adjustment handle movably connected to the joint and having at least one annular ear integrally formed with the adjustment handle to enclose a distal end of the joint so as to enclose therein a free end of the clamping plate, a block formed inside the at least one annular to securely engage with the free end of the clamping plate such that rotation of the adjustment handle forces the clamping plate away from engagement with the outer periphery of the tube to allow the tube to move relative to the joint. |
