låset

Låset refers to the mechanism used to secure openings and restrict access to doors, containers, or other spaces. It can be mechanical or electronic, and the term is used in Swedish to denote the lock in general as well as specific devices installed for security.

Common mechanical types include pin-tumbler locks, wafer locks, lever locks, and warded locks. Variants such as deadbolts provide a separate bolt that resists forced entry, while nightlatches (often used on interior or exterior doors) combine a latch and a bolt. Electronic and smart locks use keypads, cards, biometrics, or wireless communication to control an actuator that moves a bolt or latch, and may work in conjunction with traditional mechanical components.

How a lås operates varies by design. In pin-tumbler and wafer locks, a correctly cut key aligns internal components so the plug can rotate, retracting the bolt or latch. In lever or warded systems, keys align levers or bypass wards to allow movement. Electronic locks typically use a controller and actuator; access is granted via a credential, code, or remote signal, after which the bolt or electronic strike is engaged or released.

Key components commonly include a housing or cylinder, plug, springs, pins or levers, the bolt or latch, and the strike plate. Electronic variants add a control unit, power source, and reader or sensor.

Locks have a long history, evolving from early wooden and metal devices to modern, certified designs. Proper installation, appropriate security rating, and regular maintenance are important for effective protection.