Lifting device

The invention provides a lifting device. The lifting device comprises a fixing plate, a bearing plate, at least three coil springs, coiling blocks matched with the coil springs, and driving mechanisms. The coiling blocks and the driving mechanisms are fixed to the fixing plate. One end of each coil spring is fixed to the bearing plate, and the other end of each coil spring is connected and fixed to the corresponding coiling block. The coil springs are driven by the driving mechanisms to be wound on and be unwound from the coiling blocks. When the coil springs are unwound, the at least three coil springs are sequentially connected end to end to form a columnar structure, the adjacent side edges of every two adjacent coil springs are in buckling connection through at least one buckling structure. The bearing plate is supported through the stable columnar structure formed by mutually buckling the at least three coil springs, the driving mechanisms are adopted for controlling the coil springs to be wound and unwound, thus, the coil springs are short during winding and are long during unwinding, large-range lifting is achieved, and the lifting device is suitable for application occasions that the lifting device is quite short shortening and is quite long during stretching and the lifting device mass requirement is low.