Safe locks.
Safe locks
The burglar resistance of a safe is ensured by four types of locks known today. Safe locks are key, mechanical combination locks of different configurations, electronic locks and biometric locks. Let's start with key locks: cylinder-type key locks can be pin and frame. Safe locks key locks for opening have a key whose variable profile sets a unique code combination.
Key locks for lever-type safes have a key with protruding bits as a carrier of code information, the variable profile of which also sets a unique code combination.
Safe with a combination lock
To open a safe with a combination lockyou need to enter a set of three or four code numbers according to a special algorithm. The simplest locks have only one code sequence, which is already set during the manufacturing process at the factory. More expensive models of safes from burglar resistance class 2 and higher have locks where recoding is possible. Safe with a combination lockhas such a disadvantage — sensitivity to moisture and low temperatures. In addition, working with such locks, especially during the code change procedure, requires care and accuracy. The keeper of the code information for this type of lock is the code disks, the combination of which is determined by the location of the code grooves and the relative position of the disks relative to each other. As a rule, today a safe with a code lock is supplemented with a key lock, which guarantees reliability in terms of protection against burglary and in terms of durability and efficiency of its service.
Safe with an electronic lock
Safe with an electronic lockis characterized by ease of use and the ability to quickly and easily change codes. The information carrier in electronic locks is a code combination consisting of an ordered set of code values - numbers, letters, symbols entered by its owner from the keyboard. This type of lock has increased secrecy, which indicates reliability. However, there are a number of factors that can negatively affect its functionality. Safe with an electronic lockshould be kept at an acceptable temperature, in moisture-proof conditions. In addition, such a lock is sensitive to impacts and static electricity discharges.
Safe with a biometric lock
A safe with a biometric lock is one of the most technologically advanced modern devices for preserving valuables. Further development will probably occur in this area. Currently, such locks have only limited installation.
Locks for safesmust comply with the standard provided for in GOST R 51053-97. According to this standard, four classes of lock resistance to burglary are distinguished: A, B, C and D — in ascending order of class. The standard also establishes the minimum actual number of code combinations used in each type and class of lock resistance. There is also an assessment by the value of the coefficient of resistance of the lock structure to the applied effects. This standard develops requirements for burglary resistance. The design of the lock and its protective elements must ensure resistance through various types of impact in order to open the safe. That is, class A and B locks must provide protection in their design from mechanical tools, class C and D locks also from thermal tools, and Class D also from strong electromagnetic fields. In fact, this does not mean that a safe with class A and B locks can be easily opened with a thermal burner. This lock does not have protection from thermal tools, but the lock is inside the safe. A safe of 2 or 3 burglar resistance class simply will not receive a certificate without burner protection. And vice versa, if you install a class D lock on a steel cabinet, they will simply break down the door together with the lock, no one will bother and pick the master keys when opening the safe. Therefore, lock classes are distinguished in the aggregate of the characteristics of the safe as a whole. The most burglar-resistant safes should be made not only of reliable material, but also with the use of a high-quality lock.