What is the primary purpose of using a locking clip during car seat installation?

The primary purpose of using a locking clip during car seat installation is to prevent the seatbelt from loosening. When a car seat is installed using a seatbelt, it is crucial that the seatbelt remains taut, ensuring the car seat is securely fastened. A locking clip helps to secure the seatbelt in a way that prevents it from retracting or loosening during use, which could otherwise compromise the safety of the child in the event of a crash.

By ensuring that the seatbelt stays tight, the locking clip plays a vital role in maintaining the integrity of the car seat installation, thereby enhancing the effectiveness of the car seat in protecting the child. This is particularly important in achieving a proper fit, as a loose installation could lead to increased movement of the car seat and potentially place the child at greater risk during a collision.