Abstract: A safety indicator is adapted for a child safety seat having a base, a seat body latched to the base, and a support leg pivotally connected to the base. The safety indicator includes a display mechanism disposed at a front end of the base and having an indicating window, and a first indicating mechanism provided on the base and having different indicating areas selectively corresponding to the indicating window. The different indicating areas indicate different use positions of the base.

Abstract: The present disclosure discloses a seat back assembly including a backrest, a headrest and a side wing. The headrest is slidably installed at an upper end of the backrest, and the side wing is disposed on a side of the backrest and is capable of folding and unfolding relative to the backrest. The seat back assembly further includes a driving member, which is disposed on the backrest or the headrest and moves along with the headrest relative to the backrest. The headrest at least, relative to the backrest, has an initial position close to the backrest and an operation position driving the side wing to unfold relative to the backrest. The side wing is folded on the backrest when the headrest slides to a position between the initial position and the operation position.