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Electronic door locks are a way to replace keys or to add additional automation features, like remote locking or unlocking. Although most commonly found on cars, many cutting-edge security providers are offering electronic door locks for homes and businesses.
Types of door locks
In any type of door lock, a latch or bolt is made to cross the opening between the side of the door and the doorframe, preventing access. This can be a “spring bolt,” which is held in place by springs and allows the door to close (but not reopen) when locked, or the more secure “dead bolt,” which stays in place until manually unlocked. In both cases, locking and unlocking is achieved by rotating the visible element (a knob or a key in a lock cylinder) to move the bolt or latch.
Traditional key locks use some variation of the “pin and tumbler” method, in which the lock cylinder is held in place with a line of small metal pins, each of which consists of an upper and lower half. When a key is inserted and turned, the uneven “serrated” edge ensures that each pin is moved a certain distance. The cylinder may be turned only when each pin is moved just enough to create a straight separation between the upper and lower halves of all pins. There are also novel locks as fingerprint door lock.
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