Patent ID: 8226164

Claim:
A child safety seat comprising: a base, a guide-slot structure and a tooth-shaped structure being formed on the base; a seat body having a rib structure and a first protruding pillar, the rib structure being movably disposed in the guide-slot structure so that the seat body is capable of sliding relative to the base; and an engaging mechanism disposed between the seat body and the base, the engaging mechanism comprising: a first engaging part having a limit slot formed thereon and movably disposed on the seat body for engaging with the tooth-shaped structure, the first protruding pillar being slidably disposed in the limit slot of the first engaging part; and a driving device movably connected to the first engaging part and movably installed on the seat body for moving between a releasing position and a locking position relative to the seat body, the driving device comprising: a pulling part; and a connecting part connected to the pulling part, a first oblique slot being formed on the connecting part, the first engaging part being movably connected to an inner portion of the first oblique slot, the first oblique slot pulling the first engaging part away from the tooth-shaped structure when the driving device is located at the releasing position; wherein the tooth-shaped structure has a plurality of first positioning grooves, and the first engaging part is engaged with one of the positioning grooves when the driving device is located at the locking position; wherein the driving device drives the first engaging part to alternatively engage with or separate from the tooth-shaped structure when moving relative to the seat body.