Parts Of A Door Latch Mechanism

Most people turn door handles every day and never even give a second thought to the parts of a door handle until they need or choose to replace part or all of the handle. A latch is not the same as the locking mechanism of a door or window although often they are found together in the same product. On non locking doorknobs the interior and exterior handles are smooth and contain no locking mechanism.

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While the shape and style of the external components can vary depending on the type of door knob or handle or whether you unlock the door with a traditional metal key your fingerprint or a card the internal components will always involve a spring latch or deadbolt secured with a box and strike plate.

Parts of a door latch mechanism. A locking doorknob features a locking mechanism on the interior handle and a slot for a key on the exterior. The parts of a door handle include knobs levers latch mechanisms strike plates boxes and keyaways. Doorknobs have two handles one on each side of the door and are either locking or non locking. There are two main styles of latch or bolt a spring bolt and a deadbolt.

The strike plate is the part of the lock that attaches to the door frame. If you want to replace a latch bring the old one with you or make sure you know the model number and style of the old latch. Latches range in complexity from flexible one piece flat springs of metal or plastic such as are used to keep blow molded plastic power tool cases closed to multi point cammed latches used to keep large doors closed. This piece of metal extends from the door into the frame and holds it closed.

These latches or bolts are extended or retracted by the mechanisms in the lock s body. This opens the cylinder allowing the bolt to move and you to open the door. Common types deadbolt latch. The latch goes through the strike plate to form a secure lock or positive closure to the door.

Parts of a. If you re going to diy your door hardware it can be useful to know more about door handle components first. The lock engages a bolt inside the door.