The results of the national supervision and spot check of the quality of lock products released recently show that the unsatisfactory rate of mutual opening is still the biggest quality problem faced by domestic locks. Especially the bicycle locks, the pass rate of the open rate was only 62.5%. After sorting the locks in recent years, the results showed that the open rate is the lowest in the current lock products, has become a long-term existence, has not been fundamental Solve the 'big problem' problem.

According to the provisions of national standards, the mutual opening rate of locks should be less than 0.204%, that is, the 50 locks should be opened to each other, and the number of opening times should be ≤ 5 times. Although the failure of mutual opening rate seems to be a 'big problem' problem, it is not difficult to solve it. 'Technology is not difficult, it should be said that every company can do it, the key is a management problem. The biggest problem facing the domestic locks The biggest problems facing the domestic locks affect the mutual opening rate are mainly two points, one is the tooth on the key, the other is the marble of the lock core. In general, each company has a dental book for the arrangement of dentifrices, which is equivalent to a password book, ranging from thousands to tens of thousands. In theory, it is fully enough. However, if the business is poorly managed, it may happen that different batches of locks are mixed together. The locks with the same tooth arrangement are placed together or sent to the same place. This leads to the situation where a key that has been reported in the news can open several doors. For marbles, according to national standards, the range of marbles should be more than 0.5 mm. However, due to inaccurate machining or cutting corners, some companies are not able to accurately determine the accuracy of the marbles, resulting in a poor level of lockability. The open rate is too high.

In recent years, with the popularity of electric bicycles, sales of all kinds of electric bicycle locks have also increased significantly. These locks are often equipped with iron chains or steel pipes, which look very strong, but from the results of this spot check, the security needs to be given a big question mark. The mutual opening rate is the main indicator of the lock density. If the open rate is too high, it means that it is easy to be unlocked by the technology such as 'keys', and the possibility of theft is also increased. The mutual opening rate is a comprehensive indicator for assessing the quality of production site management, technical process management and quality assurance systems. He suggested that when consumers choose their locks, they should try their best to choose well-known brands and products produced by large and medium-sized enterprises. Second, they should try to purchase them in shopping malls, large-scale building materials supermarkets and other regular places.