What is the working principle of the car door lock system?- Zhejiang Salient Automotive Door System Co., Ltd.

What is the working principle of the car door lock system?

2022-09-16

When closing the door, the ratchet on the door lock system is pressed by the lock catch and rotates against the force of the return spring. The ratchet is clamped by the pawl under the action of the stop spring to complete the action of locking the door.

When opening the door, release the detent action of the pawl on the ratchet by manipulating the inner and outer handles. The ratchet rotates and springs open under the force of the return spring, and the door is opened.

When the door is closed, after the lock body contacts with the latch, it will have a resistance effect on the closing of the door. The door displacement and the resistance of the latch will overcome. At the moment when the latch contacts the lock body, the resistance will reach the maximum value.

As the distance between the door and the lock body decreases, when the ratchet in the locking mechanism crosses the latch, the resistance decreases rapidly, until the ratchet of the lock body mechanism and the latch fit completely, and the resistance increases rapidly.

The ratchet and latch of the lock mechanism often interact to achieve the important step of locking the car door, so the strength of the latch is crucial. The strength of the latch is a combination of the material essence and the strength of the connecting and forming parts.

The door latch is made of high-strength alloy steel wire [retaining ring] and high-strength automobile structural steel plate [base plate] through hot or cold riveting and heat and surface treatment.

The two are connected, that is, welded together, and the welding strength must meet the standard.

Address: No. 6, Dazhong Road, Baizhangji Town, Wenzhou, Zhejiang, China

Phone: +86-577-66816507

Fax: +86-577-65360700

Postcode: 325308