Universal adapter for stair handrail

The universal adapter for the stair handrail comprises a main body module, an adapter module and a supporting module, and the main body module comprises an adapter body and two connecting pieces connected to the two ends of the adapter body respectively. The switching module comprises a steering assembly arranged on the connecting piece and a connecting assembly arranged at one end of the steering assembly, the supporting module is arranged on the surface of the switching piece body, and the connecting assembly can rotate in any direction through the arrangement of the steering assembly, so that the switching piece can be applied to more scenes; according to the adapter, the stair handrail can be connected and fixed through the arrangement of the connecting assembly, so that the adapter can be mounted, the adapter can be stably supported through the arrangement of the supporting module, meanwhile, a worker can conveniently mount or dismount the supporting module, and the practicability of the adapter is impro