Vehicle-mounted detachable lumbar support pillow structure capable of being adjusted upwards and downwards

A vehicle-mounted detachable lumbar support pillow structure capable of being adjusted upwards and downwards, comprising a car seat backrest, a sliding assembly, a connecting member and a car seat cushion, wherein the sliding assembly is embedded and mounted in the car seat backrest, the car seat cushion is mounted in front of the car seat backrest, and the connecting member is disposed between the sliding assembly and the car seat cushion;

• one end of the connecting member is fixedly connected to the car seat cushion, and the other end of the connecting member is detachably connected to the sliding assembly;
• the car seat cushion is slidably connected to the car seat backrest upwards and downwards through the sliding assembly;
• and
• the sliding assembly comprises a casing and a matched decorative cover, a sliding groove with a certain length is vertically formed on the casing, serrations are formed on two opposite side walls of the sliding groove, and a length of the sliding groove is a stroke length of the car seat cushion that can be adjusted by sliding upwards and downwards.