Door locks are devices that secure doors mechanically or electronically, widely used in homes and public places. Traditional mechanical door locks include structures such as mortise locks and lever handle locks, with mortise locks being commonly used for entry doors due to their high security. Smart door locks integrate technologies such as fingerprint recognition and 3D facial recognition, with some products featuring human body sensing and remote monitoring functions. The market size exceeded 45 billion yuan in 2025, with a penetration rate of 35% in first-tier cities for residential use.
Anti-theft door locks are classified into Class A and Class B according to national standards, with Class B locks offering at least 30 minutes of protection against forced entry. Elevator car door locks use electromechanical interlocking structures, requiring verification of hook devices with an engagement depth of at least 7mm. Smart door lock technology continues to iterate; by 2025, the cost of biometric modules will decrease by 65%, the HarmonyOS system will enable multi-terminal linkage, and the Yangtze River Delta region will account for 40% of the national production capacity. Some products require disabling the human body sensing module within 0.5 meters due to potential privacy violations related to sensing functions. The Ministry of Housing and Urban-Rural Development requires that by 2026, the installation rate of smart door locks in newly built commercial residential buildings reach 80%.