Clamshell housing for human-machine interface (HMI)
Provided is a clamshell housing for a human-machine interface comprising a plastic “C” cover assembly and a plastic “D” cover assembly, the plastic “C” cover assembly comprising a plastic keyboard cover or palm rest, having a plurality of snap fittings thereon for attachment to a plastic “D” cover assembly, a keyboard having a keyboard connector electrically connecting the keyboard to a printed circuit board (PCB), a trackpad having a trackpad connector electrically connecting the trackpad to the printed circuit board (PCB). The housing of the invention may be easily disassembled for repair or recycling.
1 . 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.
2 . The clamshell housing according to claim 1 further including one or more electronic devices pinned to the stamped metal plate ( 226 ) with a plastic “Christmas tree” fastener ( 230 ).
3 . The clamshell housing according to claim 2 , wherein the one or more electronic devices rest on foam ( 230 ) for vibration reduction.
4 . The clamshell housing according to claim 1 , wherein the minimal plastic surround ( 210 ) has a plastic spring ( 233 ) formed therein.
5 . The clamshell housing according to claim 1 , wherein the plastic comprises a thermoplastic.
6 . The clamshell housing according to claim 5 , wherein the thermoplastic comprises polycarbonate.
7 . The clamshell housing according to claim 6 , wherein the polycarbonate is homopolycarbonate.
8 . The clamshell housing according to claim 6 , wherein the polycarbonate contains a filler selected from the group consisting of glass fibers, carbon fibers, cellulosics, graphite, graphene, carbon nanotubes, chalk, quartz powder, titanium dioxide, silicates, talc, wollastonite, montmorillonite, kaolin, zeolite, vermiculite, aluminium oxide, silica, and mixtures of these.
9 . The clamshell housing according to claim 1 , wherein the plastic keyboard cover ( 202 ) has a molded in groove ( 645 ) formed in its underside which is sized and shaped to hold a foam pad ( 640 ) in place.
10 . The clamshell housing according to claim 1 , wherein the plastic keyboard cover ( 202 ) has a plurality of preformed heat stakes ( 642 ) on its underside.
11 . The clamshell housing according to claim 1 , wherein the electromagnetic interference (EMI) shielding material ( 752 ) is selected from the group consisting of metals, conducting plastics, and conducting polymers.
12 . The clamshell housing according to claim 1 , wherein the human-machine interface (HMI) is included in one selected from the group consisting of a laptop computer, a tablet computer, a notebook computer, a desktop computer, a television, a gaming device, an advertising display, a battery, a monitor, a camera, a server, an access control, point of sale equipment, an e-reader, a projector, a thermostat, a home automation portal, a kitchen appliance, an automotive part, a healthcare device, a surgical device, a smart hub, a mobile phone, a GPS receiver, a transceiver, a remote control, a head lamp, control electronics, a router-WLAN or LAN, a wired or wireless access point, and an electrical power source.
13 . A process of recycling the clamshell housing according to claim 1 , the process comprising disassembling the clamshell housing, removing any non-plastic parts, mechanically shredding the clamshell housing, at least one of cleaning, sanitizing, sorting the clamshell housing, subjecting the clamshell housing to at least one of pyrolysis and chemolysis to obtain a product, repelletizing the product, and including the product in a polymer production process as a feedstock.