When the handle member 120 is in the closed position, the closing edge 121A is in contact with or located adjacent to the first partitioning wall 210. When the handle member 120 is in the pulled-out position, the pulling-out edge 121B is in contact with or located adjacent to the first partitioning wall 210 and the abutting section 112 is moved forward relative to the first partitioning wall 210 by a pulling distance, which has relation to the vertical distance D1 between the pulling-out edge 121B and the second pivot section 122 and the vertical distance D2 between the closing edge 121A and the second pivot section 122. The pulling distance can be in the range of, for example, 0.5 mm to 500 mm.

In the first embodiment, when the handle member 120 is in the closed position, it is located perpendicular or non-parallel to the first partitioning wall 210. On the other hand, when the handle member 120 is in the pulled-out position, it is located in parallel or non-perpendicular to the first partitioning wall 210.

As can be seen in FIGS. 1 and 2, the abutting section 112 is in the form of an L-shaped arm for abutting against, for example, a rear side of the corresponding apparatus 300. When the pulling member 110 is moved forward, the abutting section 112 also pushes the corresponding apparatus 300 forward. However, it is understood the abutting section 112 is not necessarily limited to the L-shaped arm but can be other differently shaped structures, such as a hook, a latch or a stepped structure.