An outrigger having a locking mechanism. The outrigger including an elongated member having a distal end, a proximal end, and a threaded portion proximate the distal end a moveable member operably associated with the elongated member and a slide lock operably associated with the moveable member. The thread portion may have at least one flat side and the slide lock may have at least one flat portion. The at least one flat side and the at least one flat portion may engage each other such that the slide lock may translate along, but not rotate about, the threaded portion. The slide lock may have an engagement portion for engaging a surface of the clamp. The moveable member may be used to move the slide lock towards the clamp such that the engagement portion engages the surface of the clamp. The connection between the engagement portion and the surface of the clamp may prevent the slide lock from rotating relative to the clamp. The engagement of the at least one flat surface of the slide lock with the at least one flat portion of the elongated member may prevent the elongated member from moving with respect to the slide lock and, consequently, from moving with respect to the clamp.本發明揭示一種具有一鎖固機構之懸臂支架。該懸臂支架包括:一具有一遠端、一近端及一緊接該遠端之螺紋部分之狹長構件;一操作上與該狹長構件相關聯之可移動構件;及一操作上與該可移動構件相關聯之滑鎖。該螺紋部分可具有至少一個平坦側面且該滑鎖可具有至少一個平坦部分。該至少一個平坦側面及該至少一個平坦部分可互相嚙合,以使該滑鎖可沿該螺紋部分平移而非圍繞該螺紋部分旋轉。該滑鎖可具有一用於嚙合夾具之一表面的嚙合部分。該可移動構件可用於使滑鎖向該夾具移動,以使該嚙合部分嚙合該夾具之表面。該嚙合部分與該夾具之表面之間的連接可防止該滑鎖相對於該夾具旋轉。該滑鎖之該至少一個平坦表面與該狹長構件之該至少一個平坦部分之嚙合可防止該狹長構件相對於該滑鎖移動,且因此防止該構件相對於該夾具移動。1‧‧‧懸臂支架2‧‧‧狹長構件3‧‧‧遠端4‧‧‧近端6‧‧‧連接部分/螺紋部分6a‧‧‧外螺紋8‧‧‧可移動構件10‧‧‧滑鎖12‧‧‧平坦側面16‧‧‧墊圈
