CAD Model and Drawings
For the mechanical design, we first created a detailed 3D model of the entire structure, including the DC motor mount and linkage. This allowed us to quickly build the system by laser cutting the structure of the sarcophagus (using Duron/Masonite sheet) and laser cutting/3D printing the lid-opening linkage. The Duron components were joined together using a combination of angle brackets and hot-melt adhesive. Click here to download a *.pdf file containing engineering drawings of the entire structure. Renderings of the entire assembly and the button sub-assembly are shown below.
The Sarcophagus
The Sarcophagus of DrEd is shown closed. Three of the six buttons used for the button game and holes for the button LEDs can be seen on the side panel.
The Lid/Door Opening Mechanism
Views of the lid/door opening mechanism are shown. The mechanism (or linkage) consisted of a crank (coupled to the motor) and a slotted link in which the upper end of the crank slid to open/close the lid. The crank and slotted link were fabricated using 1/8" laser-cut acrylic. Note: the bolt and nut used for the sliding joint are not shown.
Button Assembly
An exploded view of the button assembly is shown. Foam (shown in pink) was used to house the push-button and vibration motor. In addition, the button face-plate was made using plywood. A hieroglyph image was laser-engraved on each button face-plate. Note that the button assembly employed captive nuts to allow for the back-plate of the assembly to be securely mounted without requiring the nuts to be visible on the exterior surfaces of the sarcophagus.