Combination Lock

- Oct 08, 2018-

A combination lock is a type of lock. It is a series of numbers or symbols when it is turned on. The text lock can be divided into: mechanical lock, digital lock, and so on.

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.


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.


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.


Mechanical code locks are stable, durable, and require no power. However, the operation method is slow to learn, inconvenient to operate, and requires a professional to change the password.


The electronic password lock has the advantages of fast operation, simple and random modification of the password, and only need to input 0-9 digits to unlock. Although the price of electronic code locks has dropped in recent years, the quality has also improved, but because of the complexity, stability and durability are not as good as mechanical passwords.


The swipe-type password lock can use its own IC card to open the door of the safe. The operation is simple, but the requirements for the IC card are relatively high. If it is in contact with a strong magnetic object, the IC card may be weakened and the password lock cannot be opened.

Fingerprint class

Fingerprints are hard to find in this world, so fingerprint identification technology is applied to the safe, which is confidential and easy to use. However, the opponent's dry humidity requirements are stricter! The recognition of the position of the finger is also relatively rigid! Even if it is the same finger, if the position before the fingerprint is entered and the position before the door is opened, it may recognize the failure!

Other style

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. This lock has a 3-6 digit password and is extremely confidential.