An arc-shaped adjustment lock , comprising: a base ; an adjustment component ; and a pressing lock assembly , wherein: the base is connectable to a first LED cabinet ; the base has a first arc-shaped portion ; the adjustment component is connectable to a second LED cabinet ; the adjustment component has a second arc-shaped portion fitted with the first arc-shaped portion ; the first arc-shaped portion and the second arc-shaped portion are locked through the pressing lock assembly after sliding along the arc; characterized in that , the first arc-shaped portion and the second arc-shaped portion slidingly match with two elastic beads along an arc through a staggered double V-shaped groove group ; the staggered double V-shaped groove group is provided on a side of the first arc-shaped portion close to the second arc-shaped portion ; the two elastic beads are provided on the second arc-shaped portion , the staggered double V-shaped groove group comprises a first V-shaped groove group for slidingly matching with one of the two elastic beads along the arc and a second V-shaped groove group for slidingly matching with another one of the two elastic beads along the arc; and the second V-shaped groove group is located along an extending direction of the first V-shaped groove group . a base ; an adjustment component ; and a pressing lock assembly , wherein: the base is connectable to a first LED cabinet ; the base has a first arc-shaped portion ; the adjustment component is connectable to a second LED cabinet ; the adjustment component has a second arc-shaped portion fitted with the first arc-shaped portion ; the first arc-shaped portion and the second arc-shaped portion are locked through the pressing lock assembly after sliding along the arc; characterized in that , the first arc-shaped portion and the second arc-shaped portion slidingly match with two elastic beads along an arc through a staggered double V-shaped groove group ; the staggered double V-shaped groove group is provided on a side of the first arc-shaped portion close to the second arc-shaped portion ; the two elastic beads are provided on the second arc-shaped portion , the staggered double V-shaped groove group comprises a first V-shaped groove group for slidingly matching with one of the two elastic beads along the arc and a second V-shaped groove group for slidingly matching with another one of the two elastic beads along the arc; and the second V-shaped groove group is located along an extending direction of the first V-shaped groove group . the base is connectable to a first LED cabinet ; the base has a first arc-shaped portion ; the adjustment component is connectable to a second LED cabinet ; the adjustment component has a second arc-shaped portion fitted with the first arc-shaped portion ; the first arc-shaped portion and the second arc-shaped portion are locked through the pressing lock assembly after sliding along the arc; characterized in that , the first arc-shaped portion and the second arc-shaped portion slidingly match with two elastic beads along an arc through a staggered double V-shaped groove group ; the staggered double V-shaped groove group is provided on a side of the first arc-shaped portion close to the second arc-shaped portion ; the two elastic beads are provided on the second arc-shaped portion , the staggered double V-shaped groove group comprises a first V-shaped groove group for slidingly matching with one of the two elastic beads along the arc and a second V-shaped groove group for slidingly matching with another one of the two elastic beads along the arc; and the second V-shaped groove group is located along an extending direction of the first V-shaped groove group . <EOS>