Push Locks

All the cupboards and drawers are held shut when travelling by push locks. Two of the large drawers were held shut even when we wanted to open them!!  So one of today's jobs was to first dismantle one that was working and find out how it worked (an ingenious mechanism) and then to go for the ones that didn't work so well.
The outcome was good!  Also discovered the usb hub was connected to the sat nav/ radio, so that had to be on before the usb hub worked.
I had no idea what those push locks, or button push locks, were called until I searched around on internet. New toys generate new vocabulary!