Principle of helmet rotating buckle

The principle of helmet turning buckle is turning buckle. The helmet rotating buckle is a common helmet fixing device, which mainly fixes the helmet to the head through the buckle ring on the rotating buckle and the buckle groove on the helmet. The rotating buckle usually consists of two parts, one is the fixing device on the helmet and the other is the buckle. The buckle usually consists of a rotatable buckle and a buckle groove, and the buckle can be inserted into the buckle groove of the helmet in a rotating way.