Car door lock
Car door lock is a shrapnel lock. Its structure and unlocking principle are different from those of ordinary pin locks. In pin locks, each tooth key slot corresponds to two pins, but each tooth key slot of a shrapnel lock corresponds to only one small shrapnel. The lock core is made of all steel, larger than the lock core of an ordinary lock, and is also cylindrical. The length of the shrapnel is just the same as the diameter of the lock core. The lock body is a ring-shaped cylinder with a thickness of only a few millimeters. There are two pairs (four) of long grooves on the concave back of the inner ring of the lock body, which are symmetrically arranged with the center of the circle as the center. The width of the long groove corresponds to the shrapnel, which is slightly wider than the shrapnel. This slightly wider width is to facilitate the shrapnel to bounce up and down freely into the long groove. After the lock body is fitted with the lock core, the square hole in the middle of the shrapnel forms a keyhole, as shown in the figure: . That is to say, the key is inserted in the middle of the shrapnel to unlock the lock.
Car door locks are generally tooth-shaped keys. There is a small round hole that does not penetrate the bottom next to the hole of the lock core shrapnel, but this small round hole has a slit connected to the shrapnel hole. The small round hole is used to install a small spring. The function of the small spring is to hold the shrapnel so that the shrapnel can shrink when unlocking; it can automatically pop out when locking. The length of the shrapnel hole on each shrapnel is different, and the width of the shrapnel hole is the same. This determines the different depths of the tooth grooves on each key. There is no long groove on the key, it is a folded plane with tooth grooves, and the two sides are symmetrical, so that people can turn the lock core to unlock it without distinguishing up and down, left and right, as long as they can insert the key into the keyhole.
This kind of lock is usually locked. Due to the elastic force of the spring, the shrapnel is aligned with the long groove on the back of the inner ring groove of the lock body and bounces in, so that the lock core is stuck by the shrapnel and cannot be rotated. When the key is inserted into the keyhole of the lock core, the key passes through the flat square spring hole in the middle of the spring piece and goes straight to the bottom. A concave tooth groove presses a spring piece, and the spring piece will shrink back, just to the level of the circular outer edge of the lock core. In this way, the spring piece in the lock core cannot get stuck in the lock body, and the lock core can be turned to unlock. If you use the wrong key to unlock, the concave tooth groove on the key must be different in depth from the concave tooth groove on the original key. When the key is inserted into the spring hole in the middle of the spring piece, the spring piece cannot be fully compressed back to the level of the circular outer edge of the lock core, or some spring pieces cannot be compressed, and some spring pieces are stuck in the long groove of the inner ring of the lock body, or some spring pieces are pressed back too much, exceeding the circular outer edge of the lock core, and the other end of the spring piece is stuck in the long groove on the other side of the lock body. If the lock core and the lock body are not completely separated, the lock core cannot be turned to unlock. As long as one of the grooves on the key is not aligned, the lock cannot be unlocked.
This type of lock is generally a 5-tooth key, with 5 springs and 5 springs. The probability of the keys being the same is 2 in 500, which means that only after more than 250 locks are produced will one lock be the same. This is determined by the factory specifications.
In addition to the 5 spring holes, this lock also has a card hole, which is equipped with a card to prevent the lock core from slipping out of the lock body or shrinking inward when the key is inserted and twisted. A water baffle is also set at the keyhole of the lock core to block the keyhole. If the key is inserted and hits the water baffle, the water baffle will automatically shrink to one side. After the key is taken out, it will bounce back. Therefore, it can prevent water from seeping into the keyhole of the lock core during car washing or raining, causing rust on the parts. A rotating pin card is connected to the rear end (inside) of the lock core, which is used to control the switch of the lock box installed in the interlayer of the car door. There is a switch in the lock box that is directly controlled by the handle installed inside and outside the car door. Some handles are twisting type, twisted by hand, and some are pulling type, pulled by hand. The ramp-shaped lock tongue in the lock box, which is like an ordinary door lock, will shrink back and the door can be opened. There is another button that controls the ramp-shaped lock tongue. If this button is pressed, the door cannot be opened by twisting the handle. The key must be used to unlock the door, and then the handle can be twisted to open the door. There is also a flat square auxiliary lock tongue in the lock box. It is a safety lock tongue that will only extend after the car door is locked and the key is twisted in the opposite direction. The purpose of installing it is to prevent car thieves from using a long steel ruler to insert the ramp-shaped lock tongue that can be opened through the gap between the glass and the edge rubber on the side of the car window to open the door. Generally, when opening and closing the car door, as long as the button is not pressed, the door can be opened by twisting the handle directly by hand. If the button is pressed, the key must be used to open the lock. When unlocking, the key must be inserted and twisted 72 degrees clockwise, and then the door can be opened by twisting the handle of the car door by hand. If you need to lock the car door after closing it outside, you need to insert the key into the keyhole and twist it 180 degrees counterclockwise to lock the insurance. If you need to open the car door, you need to twist it 252 degrees clockwise and twist the door handle by hand to open the door.
Car electric door lock
The structure of this lock is exactly the same as that of the car door lock, except for the rotating pin at the inner end (inner end) of the lock core. The rotating pin of this lock is connected to a switch, which is a switch device for connecting the power supply to the mechanism controller of the motor (engine) and the battery. There are two small copper sheets in the switch. One end of a copper sheet is connected to a wire directly connected to the battery; one end of the other copper sheet is connected to another wire connected to the generator.
When the car electric door lock is locked, the two copper sheets are disconnected and do not touch each other, so there is no power. When the key is inserted into the keyhole and twisted 90 degrees, the rotation of the lock core drives the pin, which drives the switch to open, and the two copper sheets can come into contact with each other, so that the power is connected and the car can be started. This kind of electric door lock generally has a 5-tooth key, 5 spring holes, 5 springs, and 5 springs.
Car trunk lock
This kind of lock is mostly used to lock the trunk of a car, so it is called a car trunk lock. The lock body, lock core, springs and other structures and devices of this lock are exactly the same as those of the car door lock and electric door lock. Some car trunks and door locks are even opened with the same key. However, this kind of lock with double locks and the same key must be unlocked and locked with a key.
