A combination lock is a type of lock that is opened with a series of numbers or symbols. Passwords for password locks are usually just an arrangement rather than a true combination. Some code locks use only one turntable to turn a number of discs or cams inside the lock; some locks are a set of several numbered dials that directly drive the inside of the lock. Fancy design password lock wine bottle password lock Multi-dial The simplest combination lock, common in bicycle locks with low security settings, uses multiple dials. There is a recess in the middle of each circle. A shaft in the center of the lock has a plurality of protruding teeth for catching the dial. When the dial is transferred to the correct combination of passwords, the lock can be opened. This lock is the easiest to open. Many of these locks don't need to know that the password can be turned on. Unless its internal components are perfect, as long as the shaft is pulled out, one of the teeth will tighten the dial more than the others. At this time, the tumbled ring is rotated until a small "card" sound is heard, indicating that the tooth has entered the correct recess. Repeat this step and you will be able to open the lock soon. Single turntable A combination lock used on a padlock or on a 10,000 can be a single turntable. The turntable pushes behind several balanced discs or cams. It is customary to turn the turntable clockwise to the first number and then counterclockwise to the second number when opening the lock, so that the last number is reached. There is usually a concave position on the cam. When the correct password is transferred, the characters are in line and the lock can be opened. This type of password lock is safer, but it is not flawless. For example, some password padlocks can tighten the lock and then turn the dial until it can no longer be moved, so that the password can be found. There are also certain relationships between the numbers of the turntable code locks, so that the possibility of combination of passwords is greatly reduced. Cheap password padlocks can be opened with special linings without the need for a password. The password lock structure used on the 10,000 is more rigorous. An experienced locksmith can rotate the turntable while listening to the sound of the cam inside the lock and use the earpiece to determine the possible password. Other designs Some door locks have a numeric keypad that, when turned on, type a series of numbers in sequence. This type of lock is electronically controlled and is common in the office. The advantage is that you only need to tell the employee the password, no need to copy the key. However, if someone tells the password to an outsider, the lock will be ineffective. Therefore, the password of such a password lock needs to be replaced frequently. Compression Spring,Auto Parts,Small Coil Springs for Lamp Accessories Compression Spring,Extension Spring,Torsion Spring Co., Ltd. , http://www.nssprings.com