Speaking of lock cylinder, we have to mention the lock cylinder level. Various media in the promotion of consumer awareness of security precautions, are stressed that we must buy C lock cylinder locks, that what kind of lock cylinder is C lock cylinder? Market publicity in the emergence of super B, super C and what is it?
In fact, the current national standards on the level of the lock cylinder has been A grade, B grade and C grade division. China’s Ministry of Public Security has been officially released in January 29, 2015, “GA / T 73-2015 Mechanical Anti-theft Lock Standard”, which includes the safety level of the insert lock, from 1994, A, B two levels increased to A, B, C three levels, at the same time gives A, B, C three levels of locks have a core with the net working time of the anti-destructive.
Grade A locks
Currently on the market A grade anti-theft lock key mainly has a word key and cross key.A grade lock cylinder internal structure is very simple, basically a single structure, limited to the change of the bullet, bullet groove is less and shallow. The spring structure is a single row of spring or cross lock.
Anti-technical opening time: t<1 minute, very high mutual opening rate. (Some professionals have also tested that the technical unlocking time of A-grade locks is within 30 seconds.)
Grade B locks
Grade B locks are keyed by a flat key with a double row of bullet slots, which differs from Grade A locks in that the key face has an extra row of curved and irregular lines. The main type of lock cylinder is 3 kinds, computer double rows of lock cylinder, double rows of crescent moon lock cylinder, double-sided blade lock cylinder. Manufacturing precision, can reach the national standard of the highest level of anti-theft requirements, there is a certain anti-technical open ability, but these locks are old products, locksmiths as well as thieves have been studied thoroughly, basically can be opened within a few minutes.
Anti-technical opening time: 1 minute <t< 5 minutes, high mutual opening rate. Through strong twisting tools, the lock cylinder can be opened within 1 minute.
Note: According to relevant surveys, 90% of thieves will give up voluntarily if they can’t open the door lock within 1 minute, so although B-grade locks are not the highest grade, the security is much higher than A-grade locks.
Grade C locks
C grade locks key is used in the double row, computer composite curve slot patent key, the most complex structure, the use of multi-technology combination, and many locks have their own unique patents, anti-technology open as well as the ability to open with violence is very strong, is currently the highest coefficient of security of the lock cylinder, in addition to non-violent damage, otherwise the possibility of theft is very small, will deter thieves.
Anti-technical opening time: t>10 minutes
Super B Grade
The national standard in 2015, to A, B, C grade from the lock body structure, mechanical strength and other aspects of the detailed specification, the development of national standards tend to lag behind the development of the industry, so the lock enterprise itself will be developed far higher than the national standard of the enterprise standard, as shown in the chart below, the chart shows the national standard in 2015 was not released before the lock enterprise is currently agreed to prevent the technical opening time specification table.
In this table, we can see that the enterprise standard has set up a new level, that is, “super B level”, anti-technical opening time ≤ 270 minutes, much higher than the 2015 national standard C level.
In 2015, the new standard had not yet been implemented, and the 1994 standard had already failed to keep up with the development of technology, and the term “Super B” appeared on the market during this period. At this stage, some lock manufacturers have produced lock cylinders that have completely exceeded the standard of Grade B locks, so they negotiated to name their lock cylinders “Super Grade B”, meaning “beyond the grade of Grade B lock cylinders”. But the newborn “super B grade” does not convince users, so the development of the “enterprise standard”, such as “anti-technical opening time of not less than 270 minutes” and so on, such an endorsement in the This endorsement in the product publicity also has a clear comparison.
However, in 2015, the new standard was promulgated, the C-class lock cylinder has a criterion, but for the anti-technical opening time of this dimension, the standard is only 10 minutes, or far lower than the market has generally claimed that the “Super B” of 270 minutes, so many manufacturers are still “Super B” as a promotional point. So many manufacturers still use “Super B” as a publicity point.
However, to a certain extent, the new standard also has the purpose of regulating the name, now more and more brands, began to say that their own smart lock cylinder for the C level, the degree of replacement of the “super B” statement. There are also some brands with more stringent parameters, will also call themselves “super C”. Consumers buy, it is recommended that in addition to focusing on the grade of the lock cylinder, to consult the specific technical parameters of the lock cylinder, such as: anti-technical open time, mutual open rate, etc., so that they have more peace of mind.
In addition, because the lock cylinder and the key is a pair, so in addition to some technical parameters advertised by the manufacturer, we can also correspond to the key structure of the smart lock, to initially identify the lock belongs to which level. Similarly, the vast majority of smart locks are equipped with emergency spare key, can also be based on the principle described above to discern the level of the lock cylinder.
A few suggestions for consumers:
In any case, the lock to prevent the gentleman not to prevent the villain, there is no unsolvable lock in the world. Consumers in the purchase of smart locks, must try to buy a higher level of security locks, to minimise losses. In addition, we should also pay attention to the following points to improve the home security factor.
➊, the door inside the reverse lock. Because it is a physical reverse collar, so that even if there is a steel key outside the door can not be opened.
❷, close the thief “green channel”. When you go out and go downstairs, even if it’s only for a short while, remember to lock the door. Before going to bed, should check the windows and doors, to avoid the balcony, the vent has become a thief’s green channel.
❸ Promptly clean up posters or small adverts outside your home. Long-term unused empty house is the thief’s most ideal target, if there is a small advertisement pile up in front of the home, the thief is easy to judge the homeowner is not at home for a long time. If you are travelling for a long time, ask your neighbours or security guards to help you remove the advertisements in front of your home.
❹ Deploy relevant smart home devices in your home, such as infrared sensing products and magnetic door and window sensors. In this way, once the intrusion is detected, it will be the first time to send an alarm message, which greatly enhances the home security factor.