Patent attributes
A connecting mechanism for connecting a first unit and a second unit together is illustrated. The connecting mechanism includes a first linkage bar, a second linkage bar for being coupled to the first unit, and a third linkage bar for being slidably connected to the second unit. The first linkage bar includes a first end with a latching protrusion and an opposite second end. The second linkage bar includes a third end, an opposite fourth end, and a number of teeth. The first end is slidably connected to the second linkage bar. The latching protrusion is configured to selectively interlock with any one of the teeth of the second linkage bar. The third linkage bar includes a fifth end pivotally connected to the second end of the first linkage bar and a sixth end pivotally connected to the fourth end of the second linkage bar.
