Thingiverse
Lever adapter for round door knob by Slantvaliant
by Thingiverse
Last crawled date: 4 years, 1 month ago
These were designed for the sort-of-spherical doorknobs found in my workplace. They leave access for keys. The knob can be turned with a pen or other no-touch device, even with the elbow or forearm.
I've printed several of these in PLA. They can be printed on a 120X120 bed.
The lever is designed to be installed over double-sided foam tape placed around the circumference of the knob itself. I used one piece inside each half of the lever. Orient the lever to clear the door frame geometry. If it slips after installation, put on more tape or an additional layer.
Use #6 X 1/2" pan-head sheet metal screws to join the top and bottom, with the points away from the lever. Do not overtighten. #8's may work. If possible, use a file or rotary tool and stone to remove the points for safety.
It's not gorilla-proof. Just resistant.
I've printed several of these in PLA. They can be printed on a 120X120 bed.
The lever is designed to be installed over double-sided foam tape placed around the circumference of the knob itself. I used one piece inside each half of the lever. Orient the lever to clear the door frame geometry. If it slips after installation, put on more tape or an additional layer.
Use #6 X 1/2" pan-head sheet metal screws to join the top and bottom, with the points away from the lever. Do not overtighten. #8's may work. If possible, use a file or rotary tool and stone to remove the points for safety.
It's not gorilla-proof. Just resistant.
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