Turnover lock device of safety car chair

The utility model discloses a turnover lock device of a safety car chair. The turnover lock device is composed of a main lock and an auxiliary lock. Lock bodies of the main lock and the auxiliary lock are L-shaped. Vertical portions of the lock bodies are fixed with a chair back, and horizontal portions of the lock bodies are fixed with a seat. The main lock and the auxiliary lock are in linkage through a steel cable. The main lock comprises a base plate, a main lever handle and a tension spring. The auxiliary lock comprises a base plate, an auxiliary lever handle and a tension spring. The upper portions of the base plates are connected with an upper arm, a shaft sleeve is arranged in the middle of the upper arm, and a bayonet is arranged on the lower portion of the upper arm. Through the novel lever handles, functions of rapid unlocking and linked unlocking of a turnover lock of the car chair are realized, and safety in riding is improved.