Several types of locks
Locks come in various types based on their internal structure. Here are some common classifications:
1. Marble Structure: This type uses a set of basic cylindrical components to either lock or release the core mechanism of the lock.
2. Blade Structure: These locks feature parts shaped like blades, which engage with the lock core to secure or unlock it.
3. Magnetic Structure: This design uses magnetic materials to hold the lock in place, often found in modern electronic systems.
4. Password Structure: These locks operate using a numeric code, allowing access without a physical key.
5. Electronic Coding Structure: These advanced locks use electronic circuits and codes for enhanced security and convenience.
Additionally, door locks have different types of lock tongues, such as square tongues, slanted tongues, and knuckles. The number of tongues can be single or double. Single-tongue locks are typically used for one side, while double-tongue locks provide locking functionality from both inside and outside. Some tongues are designed to retract freely and are known as live tongues, often curved to allow smooth door opening. Others are fixed and referred to as static tongues, used primarily for securing the door with a key or knob.
Based on safety features, door locks are categorized into three types: single insurance, double insurance, and triple insurance. Each type provides different levels of protection. The three types of insurance include tongue locking, indoor locking, and outdoor locking, collectively known as "three insurance" for maximum security.
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