Travel seat bag lifting device which can be disassembled and assembled integrally with bicycle

A travel middle seat bag lifting device which can be disassembled and assembled integrally with a bicycle is composed of a lifting sleeve, a fixing sleeve, a left positioning bar and a right positioning bar, a left base plate and a right base plate, and positioning jaws, wherein the fixing sleeve is installed in a rear straight beam of the bicycle, the lifting sleeve is installed in the fixing sleeve, and the top end is connected with the bicycle seat bag; the locating jaw movable sleeve is connected the locating jaw pin hole by a pin shaft; If the cyclist needs to raise or lower the height ofthe seat bag, Pull on the cable attached to the handlebar, A return spring is compressed and disengages from the positioning groove by pulling the pin shaft positioning pawl, A lif spring raise or lowers that lifting sleeve, The hand releases the cable and the positioning claw enters the selected positioning groove. The beneficial effect of the technology is that the bicycle can be assembled on the bicycle rear straight beam integrally or disassembled integrally at any time without damaging the existing bicycle structural components. The height of the bicycle seat bag can be adjusted up or down without leaving the seat bag when the bicycle rider is traveling.