No matter what industry, users usually require that theelectric wiring is  not only secure andreliable  but also suitable for variouscircumstances. The easy operation and accessibility of the connectors also shouldbe guaranteed. Wain  products meet thoserequirements by various shells and relative interlocking system.

        Now the fellow colleagues usually use U- shape lockinghood to fasten the plug and receptacle. Spring parts are inserted in the narrowhole of the hook opening, and there is a pivoted locking part in the springpart. The spring part is made of metal and the locking parts is made of plastic<such combination cause the bad performance of the whole lockingsystem. Even more, there are too many locking parts, too much process,inconvenient in processing, time-consuming, high cost etc.

         SC series of locking device, which WAIN has developed, is made of high strength stainless steel in unibody design that could completely avoid breakage and also could ensure its complete function even being used in rigorous environment for a long time. The main body of the lock is all in one and there is elastic parts at the two ends of the main body. The elastic parts are used to fasten plug and receptacle . The crescent-shape elastic ends are with unique appearance, ingenious structure. The lever is confortable to handle with the good silicone rubber. The roller structure of the elastic ends make locking smoother. This locking device has been patented as utility model, the patent NO. is 201420344473.9.. As the locking device for the rectangular connector, SC series of locking devices are widely used in the industry of railway, power control cabinet etc.