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Door Latches

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Door latch is an integral part of door hardware. Typically, door latches do not lock; however, some latches are available with a key-locking mechanism or can be secured with a padlock. Latches with a locking option can only be opened from the outside with a key. In order to complete the door ensemble, door latch consist of strike plates, tube latches and rim lock plates. However, there are latches that can also be opened without a key.

Materials Used
Mostly metals are used for making door latches. Some of the common materials used in the process include:

Iron
Steel
Aluminum

Door Latch Mechanism
The working principle of a door latch is relatively simple, compact and easy to install.

A typical door latch mechanism has a pivoted latch, which is disposed between a retaining solenoid and a four-bar toggle linkage.
The toggle linkage is meant for connecting the operating system of the solenoid to the latch.
The toggle linkage is also provided with an under-the-center arrangement in a direction opposite to the solenoid in the latched position.
This offers considerable mechanical advantage to strengthen the holding force of the solenoid.
When the solenoid is de-energized and pressure is applied to open the door, the latch pivots and the toggle linkage collapses to release the keeper bar.

Important Features

Some door latches have an inside release that is a component on the inner side of the latch that allows it to be actuated. Again door latches have mounting holes or slots for securing them to doors, drawers, or cabinets.
There are recessed latches that are designed to be mounted in an indentation in the housing.
Latches that contain gaskets prevent the entry of environmental contaminants when used under pressure.
Weather resistant door latches are also available.

Types of Door Latches
Depending on the door on which they are used door latches can be of the following types:

Tags:- Door Latches Suppliers, Iron Door Latches, Iron Door Latches Exporters

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