The hook between heaven and earth is common in household security doors, which makes people feel safe. Then why do many smart lock installers say it is best to remove the heaven and earth hook? What impact does the hook of heaven and earth have on safety?
What is a hook between heaven and earth?
Ordinary locks will pop out the main locking tongue on the side of the door. On this basis, the number of locking tongues that can be ejected is increased above and below the door, so that the door can be fixed on the door frame more firmly. And this extra bolt goes up and down, hence the name "Heaven and Earth Hook".
Therefore, the heaven-earth hook mainly increases the lock point on the door to prevent the door from being pried open by violence and increase the safety.
How to judge whether there is a hook between heaven and earth?
You can lock the door when the door is open, and touch it with your hand to see if there is a protruding lock tongue at the bottom of the door. If there is, it means that the entrance door has a hook between heaven and earth, and the hook between heaven and earth is working normally; If there is a lock hole of the heaven and earth hook on the door, but it cannot protrude when the door is locked, it means that there is a heaven and earth hook, but the heaven and earth hook has no effect.
Why is the hook between heaven and earth unnecessary?
The hook of heaven and earth resists the risk of violent door breaking, but it does not defend against technical unlocking. The vast majority of burglary is technical unlocking. By simulating the situation of opening the door with the correct key, it doesn’t matter whether there is a hook between heaven and earth.
Moreover, in dangerous situations such as fire, if the lock cannot be unlocked by technology, the lock tongue of the heaven-earth hook will increase the difficulty and time of breaking, which is very unfavorable to fire safety.
Do you want to use the hook of heaven and earth to install the smart door lock?
As for the installation of smart locks, the master will suggest that the heaven-earth hook be removed, because many fully automatic smart locks need to drive the lock tongue directly through the motor inside the lock body, which has a relatively large load. If the heaven-earth hook is added, it will not only require a stronger motor, but also consume more electricity, causing users to change batteries frequently. Therefore, the master who installs smart door locks will generally recommend not using the hook of heaven and earth.
Generally speaking, for modern families, the hook between heaven and earth is really not that important. Moreover, many smart door locks do not support the hook of heaven and earth, which is the trend.