Clamshell housing for human-machine interface (HMI)

A clamshell housing for a human-machine interface (HMI) comprising a plastic “C” cover assembly and a plastic “D” cover assembly,

• a plastic “C” cover assembly comprising
• a plastic keyboard cover or palm rest, (202) having a plurality of snap fittings (203) thereon for attachment to a plastic “D” cover assembly,
• a keyboard (204) having a keyboard connector (222) electrically connecting the keyboard to a printed circuit board (PCB) (220),
• a trackpad (206) having a trackpad connector (224) electrically connecting the trackpad to the printed circuit board (PCB) (220),
• wherein the keyboard (204) and the trackpad (206) are each attached to the plastic “C” cover assembly and attached through a stamped metal plate (226) to the printed circuit board (PCB) (220) with a plurality of preformed plastic heat stakes (232),
• wherein a minimal plastic surround (210) is mounted beneath the stamped metal plate (226) onto the plurality of preformed plastic heat stakes (232),
• wherein the printed circuit board (PCB) (220) is attached at a plurality of plastic threaded inserts (227) to the minimal plastic surround (210) with a plurality of plastic “Christmas tree” fasteners (235);
• and
• wherein a plastic spring (233) is formed in the minimal plastic surround (210) to hold the trackpad (206) in tension, and
• wherein the plastic “C” cover assembly is attached through a plurality of metal screws (256) to the plastic “D” cover assembly;
• and
• the plastic “D” cover assembly comprising
• a vent mesh (750) attached to the plastic “D” cover by the plurality of metal screws (756),
• an electromagnetic interference (EMI) shielding material (752) attached to the plastic “D” cover assembly by a plurality of preformed plastic heat stakes (754),
• a power source (753), and
• a plurality of press-in rubber feet (760) inserted into slots (759) of the plastic “D” cover assembly.