Demountable assembly structure

A demountable assembly structure, comprising:

• a first body having a first sliding surface defining a top of the first body and a slide switch recess positioned proximate to the first sliding surface;
• a second body having a second sliding surface defining a bottom of the second body, arranged such that when the second body is stacked on top of the first body with portions of the first sliding surface and the second slide surface in contact, the second sliding surface is slidable relative to the first sliding surface, the second body having an engaging channel positioned proximate to the second sliding surface, the engaging channel being opposite the slide switch recess when the first body and second body are slid to an engaged position;
• and an engaging component comprising a slide switch and a resilient element, the resilient element having a basal portion fixedly disposed in the slide switch recess and two resilient engaging arms extended from the basal portion to the engaging channel, the engaging component moveable in the slide switch recess in a direction of force perpendicular to the first and second sliding surfaces between a first position and a second position;
• a rail disposed on one of the first sliding surface and the second sliding surface, and a groove corresponding in position to the rail disposed on the other of the first sliding surface and the second sliding surface, the rail arranged to be received in the groove with the first sliding surface and the second sliding surface in contact and configured to allow the second body to slide on the first body in a direction toward the engaging component;
• wherein the first body, the second body, the engaging component, and the rail are arranged such that:
• when the engaging component is in the second position, the second body is slidable on the first body such that the two resilient engaging arms come into contact with an outer edge of the engaging channel and are first compressed towards each other by the outer edge of the engaging channel in a direction parallel to the first and second sliding surfaces, and when the two resilient engaging arms pass the outer edge of the engaging channel, the two resilient engaging arms are released and engaged inside the engaging channel such that the second body is in the engaged position;
• and
• when the second body is in the engaged position, movement of the slide switch to the first position disengages the two resilient engaging arms from the engaging channel, such that the second body is slidable on the first body.