Patent ID: 7441733

Claim:
A support device for a child vehicle safety seat, said support device comprising: a positioning tube having a first tube portion adapted to be connected to the child vehicle safety seat, and a second tube portion opposite to said first tube portion, said positioning tube being formed with a plurality of positioning hole units spaced apart from each other along a tube axis, each of said positioning hole units including a pair of positioning holes that are disposed at diametrically opposite positions relative to the tube axis; a support tube sleeved telescopically on said second tube portion of said positioning tube and formed with a pair of through holes that are disposed at diametrically opposite positions relative to the tube axis; a support base sleeved on said support tube, and having a mounting seat disposed at a horizontal level corresponding to said through holes in said support tube; and a seat height adjusting unit including an actuator mounted movably in said mounting seat and having a pair of extending arms respectively disposed at opposite lateral sides of said support tube, and a pair of protruding members each disposed at a respective one of said extending arms, said protruding members being extendible into said through holes and said positioning holes of a registered one of said positioning hole units to retain said positioning tube at a desired extended length relative to said support tube, and a spring member disposed in said mounting seat for applying a biasing force to said actuator.