Panasonic Wide 21 Cosmos cover for switchbot

This is a light switch cover for Japanese Panahome Cosmos Wide 21 horizontal rocker switches, but with an integrated Switchbot button holder, so you can fully replace your built-in light switch with a Switchbot button.

I previously released this with snaps, but they were too unreliable and degraded over time. This version has small hex pegs on the Switchbot button holder that push onto the light switch cover. Make sure that both pieces have cooled completely; if you try to attach them while they are still warm, you can deform and snap the pegs.

I also use super glue on the inside of the case to make sure the pegs do not come loose.

You can also remix this with my normal light switch cover and the Switchbot button case if you'd rather assemble/print differently.

This is printable as-is in PLA, PETG, or ASA. I've tested all three.

There are two sets of liners available:

• If you'd like a snug fit with an ASA cover, use the liner on  `Print PLA or PETG for ASA cover`
• If you want a snug fit with a PLA/PETG cover, use the liner on `Print PLA or PETG for PLA or PETG cover`

Assembly

• Print the button case, cover and liner; let them cool off so that the small parts can set
• Attach the button case to the cover; super glue the pegs from the back if you want more security
• Attach the liner to the switch plate
• Press the cover on firmly; it should be hold on via friction and suction. It may wobble slightly but requires force to remove.

Alternatively, you can super glue the liner to the cover and attach them as a single piece. This can make it more difficult to extract the cover from the switch plate, so I don't do it myself.

Features

• Snug fit for Switchbot smart button
• Blocks LEDs on the light switches
• Friction-fit cover stays on unless you want to take it off
• Easy-to-remove inner plate
• Tasteful chamfering