Door lock service life The shelf life of hardware door locks is 3~5 years

It is reported that hardware door locks are essential for our homes, but few people pay attention to the shelf life of the door locks? China has become the world's largest producer and consumer of locks. The domestic lock industry has annual sales of more than 40 billion yuan, a production capacity of more than 2 billion sets, and an annual export value of more than 10 billion yuan.

　　 But most of them still rely on low labor costs to obtain production orders, which has caused huge price differences and uneven quality in the lock market. Locks with the same appearance range from a few yuan to a few hundred yuan.

　　 One key to open the N house lock, the price of the same shape of the lock ranges from ten yuan to several hundred yuan. Many people may not know when to change the lock and what kind of lock.

　　General doors and anti-theft door locks should be replaced after 5 years of use. It is best to choose products of large brands and excellent quality. After walking around the lock market, no one can clearly tell how to choose.

　　 Class B lock cylinder is more anti-theft

　　 The author has learned that there are three types of lock cylinders currently in use on the market: Class A, Class B, and Super Class B. Class A lock cores are destructively open for more than 15 minutes, and technically resistant for more than 1 minute. The destructive opening of Class B lock should be more than 30 minutes, and the anti-technical opening should be more than 5 minutes. The biggest feature of the super B-class anti-theft door lock is that the anti-technical opening time is greater than 240 minutes.

　　The lock cylinder can also be distinguished by the number of rows of marbles. Generally speaking, multi-row pin locks are better than single-row pin locks, and multi-row invisible pin locks are better than ordinary multi-row pin locks. The master lock repairer told the author that since the cost of Class B locks is much higher than that of Class A locks, most manufacturers on the market produce Class A locks. Citizens can check their own anti-theft door keys. If it is a single row of marbles, the anti-theft door is likely to be installed with a class A lock cylinder. If citizens feel unsafe, they can consider replacing the super-B lock core to improve the overall anti-theft performance of the anti-theft door.

　　In addition to the lock cylinder, there are also the quality of hardware accessories. The materials are generally aluminum alloy, stainless steel and copper, of which aluminum alloy is slightly worse and copper is the best, but the price of locks is also the highest. The important thing is that even if the same copper is used, the material of the lock is very different, and it is difficult for consumers to distinguish. The salesperson told the author that the only way consumers can distinguish is through experience. Qualified locks are more delicate in workmanship, unqualified products are rougher, and qualified locks have a crisp sound when opened, and unqualified locks often have the surface Scratch marks, the key insertion is relatively loose, and the opening sound is relatively dull.

　　Door lock needs to be replaced in 3~5 years

Chen Li, chairman and general manager of Ming Door Lock Industry, said that household door locks usually have to be replaced in 3 to 5 years, but many people don't know it, so they hope to use promotions to attract consumers and popularize door lock knowledge.

　　General locks, if they have been used for a long time, the lock core is aging and worn out, it is easy to be opened by a key with a similar tooth shape. Chen Li said that the doors of many communities are now uniformly installed by real estate developers, and the same brand of locks are used in large quantities. In theory, it is easy to lock and open multiple doors at once. Even for security doors, many users in a community can easily choose the same brand, leaving the same hidden dangers.

　　Guangfu Road, a master craftsman who specializes in keys, told the author that many residents have neglected the shelf life of the lock, which takes more than ten or twenty years after use. Nowadays, the general lock has 5 marbles. After a long time of use, if the two marbles in the lock are severely worn, the lock can be easily opened when some keys are inserted corresponding to the other 3 marbles. He suggested that ordinary door locks should be replaced after being used for up to 5 years.