I am repairing a lamp whose plastic rotary knob has degraded and broken (as seen on the right of the photo below). The knob originally moved a small metal pin, which conducted the electricity for the lamp (the pin is visible in the center of the image on the left, and the top of the image on the right).
Now that the knob is broken, it can't hold the pin in place. This has happened before and I've just glued the plastic back together, but now I'd like a longer term solution. Since I can't find a replacement for the plastic knob, I have inserted a cord switch into the wire instead, which works just fine. But to make this solution work, I need to keep the metal pin in place and in the on position.
Here are some options I've considered:
- Solder (risking damage to the plastic bulb fitting)
- Non-conductive putty (couldn't find something that fit the bill)
- Rubber band
I've seen some posts online that suggest glue, cardboard, or rubber bands would work for low voltages (the latter two would be used to wedge the pin in place). But I don't know if 120 volts counts as "low voltage" for this purpose. So I'd appreciate any advice on whether one of these solutions or another one I haven't thought of would be most appropriate.