Space extension arm controlled by spring-driven inhaul cable

A spring-driven inhaul cable-controlled space extension arm relates to a mechanical extension arm, and comprises a top plate spring (1), a vertical rod (2), a tripod (3) and a base (4), the inhaul cable (6) is fixedly connected with the upper top plate (5) and penetrates through a threading hole of the lower top plate (10) to move up and down; the top plate spring (1), the middle spring (8) and the lower spring (9) are fixedly connected with the upper top plate (5) and the lower top plate (10); according to the dynamic state, the stretching arms are unfolded, the inhaul cables (6) are released, the upper spring (7), the middle spring (8) and the lower spring (9) open the upper top plate (5) and the lower top plate (10), and the top plates are unfolded; when the extension arm is in an unfolded state, the spring and the tripod act to pull the upper vertical rod (12) and the lower vertical rod (13) to be unfolded, the included angle between the upper vertical rod (12) and the lower vertical rod (13) is changed f