Car trunk lock usually consists of the following main parts:

1. Lock core: the core component of the trunk lock, usually made of metal materials, such as steel or copper alloy. The lock core contains a key slot and a lock core motor, which are used to open and close the lock. The design and manufacturing quality of lock core directly affects the safety and stability of trunk lock.

2. Locking tongue: located inside the trunk lock, the trunk can be expanded, locked or released through the control of the lock core. The lock tongue is usually made of metal material, which has high strength and hardness, can bear large tension and pressure, and ensures the safety of the tail box.

3. Lock shell: the external part of the trunk lock, usually made of metal or plastic material, is used to protect the lock core and other internal parts, and at the same time has the functions of beauty, waterproof and dustproof. The design and manufacturing quality of the lock shell directly affects the appearance and durability of the tail box lock.

4. Lock core control unit: The trunk lock is usually equipped with an electronic control unit, which is used to realize functions such as remote opening and automatic unlocking. The control unit contains electronic components such as circuit board, chip and relay, which can realize the intelligence and convenience of the trunk lock.

5. Lock core transmission device: The trunk lock also contains a transmission device, which is used to convert the rotary motion of the lock core into the telescopic motion of the lock tongue. The transmission device is usually composed of metal and plastic parts to ensure the normal operation and reliability of the trunk lock.

To sum up, the structure of automobile trunk lock mainly includes lock core, lock tongue, lock shell, lock core control unit and lock core transmission device, which work together to ensure the safety, stability and convenience of trunk lock.