Patent ID: 8141951

Claim:
A child safety seat comprising: a seat body; an engaging board connected to the seat body, a tooth-shaped structure being formed on the engaging board; a backrest movably disposed on the engaging board; and an engaging mechanism disposed between the engaging board and the backrest, the engaging mechanism comprising: an engaging member pivotally connected to the backrest for engaging with the tooth-shaped structure; and a driving device movably connected to the backrest, the driving device comprising: a connecting member pivotally connected to a first end of the engaging member; and a pulling member connected to the connecting member, for driving the first end of the engaging member to rotate relative to the backrest when the driving device moves to a releasing position, so as to disengage a second end of the engaging member from the tooth-shaped structure, and further for driving the first end of the engaging member to rotate relative to the backrest when the driving device moves to a locking position, so as to engage the second end of the engaging member with a positioning groove of the tooth-shaped structure, such that a height of the backrest relative to the engaging board is fixed; wherein the backrest is capable of moving relative to the engaging board when the second end of the engaging member is disengaged from the tooth-shaped structure.