A mobile frame includes an upper frame and a lower frame. The upper frame includes an upper outside frame and an upper inside frame. A first coupling portion, of the upper frame, includes a first continuous slot module, a second continuous slot module and a first magnetic coupling device. The lower frame includes a lower outside frame and a lower inside frame, and the lower inside frame is coupled to the lower outside frame. A second coupling portion of the lower frame includes a second magnetic coupling device. A plurality of magnetic elements are positioned between the first and the second continuous slot modules.