Single lock:
This type of lock is opened with a key outside the door, and the door is opened with a handle (or knob). It has strong confidentiality outside the door, easy operation inside the door, no need for a key, and is especially suitable for use in emergency situations such as fire prevention.
Double lock:
The door and the door are opened with a key, so its confidentiality is higher than that of a single lock. The thief can't open without a key after entering the house. In addition, most of them also have a defense function, as long as there is no key to indent the lock tongue, use General tools such as screwdrivers, pliers, and hammers cannot remove the lock. However, it is unfortunate that there is no single lock in the emergency operation, and it is easy to cause errors in the busy operation. In the double lock, since the lock tongue is in the vertical direction, the lock tongue is generally cylindrical, and the lock tongue is extended or contracted. In general, the key or knob (or handle) is used, so the self-collision and non-self-collision functions are formed in the structure of the lock tongue. The difference between them is:
1. Self-touch function: There is a slope on the cylinder lock tongue. As long as the lock body and the lock plate meet, the lock tongue will be hooked. It is commonly called self-touch. At this time, the key must be used to open the door. Use the screw (or handle) or the key to lock or open; the self-touch function lock body usually has a safety button. When the door needs to be covered and not locked, the safety button must be locked to make the lock surface The oblique tongue does not extend, the door can be freely opened and closed, and the door does not have a key. It is impossible to open the door.
2, non-self-touch function: the cylinder lock tongue does not have a slope, when only the lock tongue is retracted, the door can be closed, and then locked with a knob (or handle) or a key, when the lock tongue is extended, the door However, it cannot be turned off. The lock generally does not have a safety button. The door needs to be switched with a key, and the door is closed with a knob (or handle) or a key.
Since the single lock and the double lock of the external lock have their own advantages and disadvantages, it is better for the consumer to purchase according to the actual needs when purchasing, to ensure the safety performance of the external lock in the home. More importantly, it is easy to use.
Andja produces excellent quality locks, And we accept customization. For more information about Andja's products, contact your Andja representative or call 18962195537