How to choose a lock to be a real anti-theft lock?
A level b lock can not stop the thief
Case: When Mr. Zhao, who lives in a building materials market, just returned home, he found that his home was stolen: “The doors and windows were not damaged, but upon inspection, the house’s 8,000 yuan in cash and jewelry worth nearly 10,000 yuan were stolen.”
Cases of burglary usually occur between 1 am and 4 am, 8 am to 11 am and 3 pm to 5 pm in the afternoon. Nowadays, many lock cylinders are mostly anti-technical to open low-grade a or b-class anti-theft lock cylinders. According to the national standard, the opening time of the a-class lock core technology is 1 minute, and the opening time of the b-class lock core technology is 5 minutes.
Super b-class lock core is really anti-theft lock
Using the super b-class lock, the anti-technical opening time of the super b-class lock is more than 270 minutes, the anti-violence is turned on for more than 30 minutes, and the mechanical lock cylinder of the super b-class is upgraded and upgraded to effectively prevent theft of the technical lock. At the same time, the locks and locks must be found in the formal units of the public security organs, and the qualifications of the unlocked personnel should be checked. It is not advisable to trust the small advertisements that are randomly posted at the door, resulting in the installation of unqualified locks or key scams.
Class a lock
At present, the a-level anti-theft lock key on the market mainly has a word key and a cross key. The internal structure of the a-class lock cylinder is very simple, limited to the change of the marble, and the marble groove is small and shallow. The anti-technical opening time is extremely high within 1 minute. The marble structure is a single row of marbles or a cross lock.
Class b lock
The b-level lock key is a flat-panel key with a double-row marble slot. The difference with the a-level lock is that the key surface has a row of curved and irregular lines. The main types of lock cylinders are 3 types, computer double-row lock core, double-row crescent lock core, double-sided vane lock core. The anti-technical opening time is 5 minutes, and the mutual opening rate is high. With a strong twist tool, the lock cylinder can be opened in 1 minute.
Super b lock
The shape of the key is a single-sided blade inner milling slot or an outer milling slot key. The lock cylinder type is a side cylinder lock core; it can not be technically opened after 270 minutes of inspection by the Ministry of Public Security, and the regional mutual opening rate is zero (one million and one million) . The structure of the marble is double-row blade and v-shaped side column locking; if the lock cylinder is opened with a strong twisting tool, the inner core of the lock cylinder is broken, and the self-explosion is locked, resulting in failure to open.
Lock maintenance tips
When the lock is in use, periodically (half year or once a year) or when the key is not inserted smoothly, do not use any liquid oil such as cooking oil as a lubricant to prevent the grease from sticking to the marble spring, resulting in the lock not being able to be locked. Turn it and it won't turn on. Usually you can use the pencil at home to apply to the key, and then insert the lock cylinder to rotate a few times to play the role of lubrication. In addition, professional lubricants, rust inhibitors, etc. for locks are also available. Some zinc alloys and copper locks, when installed on the door for a long time, will find "spots". This phenomenon is not rust, but is oxidation. If this happens, just wipe it with a surface wax. You can remove the spots.