Submissive constant-force support mechanism

The invention belongs to the field of a submissive mechanism and relates to a constant-force mechanism, in particular to a submissive constant-force support mechanism capable of being used for patients with wounded lower limbs. A flexible rod and a rigid rod are sequentially and fixedly connected with a guide block for forming a combined rod, one end of the combined rod is fixedly connected with a framework, the other end of the combined rod is fixedly connected with a slide block, the axial line of each rod is parallel to the center line in the length direction of a guide rail, the slide block moves in the guide rail, the combined rod generates constant support counter force through external force F when the slide block moves in the guide rail, and the constant support of an object in the displacement section is realized. The submissive constant-force support mechanism has the characteristics that parts are few, the structure is simple, the manufacture price is low, the use is reliable, the carrying is convenient, and the like. The submissive constant-force support mechanism can be used for supporting the upper body weight of the patients with the wounded lower limbs in the healing period, the patients can do some active heeling activities such as standing, walking, crouching and the like, and simultaneously, the submissive constant-force support mechanism can also be used in mechanical products requiring the constant force in other fields such as household appliances, traffic, building, metallurgy and the like.