| Electronics > Projects, Designs, and Technical Stuff |
| Evolution of usb connector? |
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| wraper:
--- Quote from: james_s on December 19, 2018, 06:06:36 am ---The micro connectors are ok for phones, because phones are small and light and generally do not exert a great deal of force on the cable. Put a micro USB connector on the back of a 15 pound laser printer and then trip over the cord and I bet it snaps off the plug, rips the connector off the PCB or both. Try the same with a fullsized USB connector and there's a pretty good chance it will spin the printer around and yank the plug out of the socket without damage. --- End quote --- Really? USB-B is among the worst ones. Only two mounting legs located closer to the rear side. Very easy to rip off. Actually I've done just that a few days ago on some defective boards I was going to throw out. Plugged cable in and easily ripped off USB-B connectors. And weight of a phone does not matter much when you grab the phone and pull it to yourself. The only variant which is significantly stronger than micro USB with TH is USB A with multiple sockets stacked. Those have 4 mounting legs and are very sturdy. BTW metal thickness of micro USB and full size connectors is about the same. Also one important thing is how connector is surrounded/supported by enclosure. It can add a lot of strength. |
| wraper:
Also how sturdy do you think are these? Simple school level physics about lever which work against such implementations. |
| james_s:
Those PCB mount plugs are pretty bad, but a micro version wouldn't be any better, I don't think they even make PCB mount male micro USB. The fullsized B connectors normally have the far end supported by the opening in the housing it goes through. You may have had one break but I never have. They're bigger and heavier, with large through hole posts. Has anyone else here ever had one break? Can anyone point me to a printer, scanner, 3.5" hard drive or other bulky USB peripheral that has a micro USB port? Anyone? |
| Gyro:
--- Quote ---The fullsized B connectors normally have the far end supported by the opening in the housing it goes through. You may have had one break but I never have. They're bigger and heavier, with large through hole posts. Has anyone else here ever had one break? Can anyone point me to a printer, scanner, 3.5" hard drive or other bulky USB peripheral that has a micro USB port? Anyone? --- End quote --- Loss of retention pressure (contact pressure?) is the only thing I've ever seen with them - insertion gets loose. |
| wraper:
--- Quote from: james_s on December 19, 2018, 07:07:05 pm ---The fullsized B connectors normally have the far end supported by the opening in the housing it goes through --- End quote --- So do micro USB. --- Quote ---You may have had one break but I never have. --- End quote --- I've seen USB-B broken in a device worth more than $100k. Mounting legs just snapped off. --- Quote ---3.5" hard drive or other bulky USB peripheral that has a micro USB port? --- End quote --- As of current year most external HDD, even 3.5" don't have full sized USB port. |
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