Support device for a child vehicle safety seat

摘要

A support device includes a positioning tube to be connected to a child vehicle safety seat and formed with a plurality of positioning hole units. A support tube is sleeved telescopically on the positioning tube and is formed with a pair of through holes. A support base is sleeved on the support tube, and has a mounting seat disposed at a horizontal level corresponding to the through holes. A seat height adjusting unit includes an actuator that is mounted movably in the mounting seat, that is biased by a spring member, and that engages removably the through holes and a registered one of the positioning hole units to retain the positioning tube at a desired extended length relative to the support tube.