A multifunctional child carrier includes a carrier body, an adjustment mechanism, a seat belt fitting part and a seat belt interference assembly, the carrier body includes a seat part, a backrest part, and a back support panel provided with a headrest portion and is pivotally mounted to the backrest part to move between a highest angle position and a lowest angle position, the seat belt interference assembly is configured to allow a car seat belt to fit with the seat belt fitting part when the back support panel is at the highest angle position, and to block the car seat belt from fitting with the seat belt fitting part when the back support panel is not at the highest angle position.

A safety belt adjustment mechanism for use on a safety seat. The seat including a backrest part and a seat part, each movable with respect to the seat base. The safety belt adjustment mechanism includes: a safety belt; a locking device on the seat part for locking the safety belt; a first pin on the seat part; and a second pin on the base; the first and second pins guide the safety belt; the safety belt passes through the locking device, around the first and second pins, and to the backrest part; and when the seat is adjusted from the sitting position to the lying position, the seat part moves toward the base to bring the first pin toward the base, such that a distance between the first and second pins shortens and the safety belt becomes loose without the locking device releasing the safety belt.

A safety belt adjustment mechanism for use on a safety seat. The seat including a backrest part and a seat part, each movable with respect to the seat base. The safety belt adjustment mechanism includes: a safety belt; a locking device on the seat part for locking the safety belt; a first pin on the seat part; and a second pin on the base; the first and second pins guide the safety belt; the safety belt passes through the locking device, around the first and second pins, and to the backrest part; and when the seat is adjusted from the sitting position to the lying position, the seat part moves toward the base to bring the first pin toward the base, such that a distance between the first and second pins shortens and the safety belt becomes loose without the locking device releasing the safety belt.

The present disclosure relates to child restraint systems and components of child restraint systems, for example child seats like a toddler seat and an infant seat, support bases of child seats, in particular support bases that are fixable on a vehicle seat and which bases may be an integral part of a child seat or which may be configured such that a child seat is releasably couplable to them.