In order to protect the legitimate rights and interests of consumers and promote the healthy development of the plug and socket industry, the General Administration of Quality Supervision, Inspection and Quarantine conducted a national supervision and inspection on the quality of plug and socket products. A total of 46 products produced by 46 enterprises in 6 provinces and cities including Guangdong, Zhejiang, Jiangsu, Sichuan, Fujian and Shanghai were sampled. The sampling pass rate was 80.4%.
The results of spot checks show that the quality of products of large enterprises is good, the sampling rate of products is 100%; the sampling rate of small enterprises is 68.4%, and there are many problems in product quality.
The main quality problems found in the spot checks:
1. The mechanical strength is unqualified. The standard requires that after the plug has been subjected to 1000 drum drop tests, the plug pin can still be properly inserted into the socket without endangering personal safety. In the spot check, the mechanical strength of the individual plugs is unqualified, mainly when the plug is dropped, the plug pin is seriously deformed or the plug casing is broken and cannot be used.
2. The heat resistance is unqualified. The heat resistance of the insulating material in the socket is an important safety performance index. The national standard stipulates that the plastic parts of the product must have a certain heat deformation resistance and should not be softened within a certain temperature range. In the spot check, some fixed sockets were not qualified for heat resistance. One of the products was severely deformed after 100 °C heat resistance test and could not be used normally.
3. The size of the plug and socket is unqualified. The dimension inspection is mainly to check whether the type and size of the plug and socket are designed and produced according to the flat plug and socket system of our country. It is related to the plug and socket of the same type that can be inserted into each other and the plugs and sockets of different types cannot be inserted. It is related to the plug and socket. Is it possible to use and safely use the problem? In the spot check, the size of the plugs and sockets of some products was unqualified. Some of the plug current-carrying pins were not far from the edge of the plug, which easily led to the human hand touching the live plug during normal use, resulting in a safety accident; the length of the appearance of some socket jacks If the size is lower than the lower limit required by the standard, the plug may not be properly inserted into the socket.