Supporting mechanism used for flexible small-diameter rotating shaft

The utility model discloses a supporting mechanism used for a flexible small-diameter rotating shaft. The supporting mechanism comprises an integrated fixing frame, multiple sets of flexible supporting frames which are installed on the fixing frame and can extend and contract directionally, and multiple sets of cylindrical rollers, wherein the multiple sets of rollers are tangent to one another through the flexible supporting frames to form an airtight space which fixedly supports the rotating shaft, a positioning pin which rotates around an inner diameter hole of each set of roller is installed in the inner diameter hole of each set of roller, a bending part is arranged at one end of the positioning pin, and the other end of the positioning pin is connected with a corresponding set of flexible supporting frame. According to the supporting mechanism disclosed by the utility model, cylindrical out surfaces of the multiple sets of rollers which are tangent to one another are utilized for forming the airtight space, so that the fixed supporting for the flexible small-diameter rotating shaft is achieved, the flexible small-diameter rotating shaft can also be flexibly opened, and wires can be conveniently wound and smoothly fed; the supporting for a super-long rotating shaft can be achieved by utilizing the multiple sets of flexible supporting frames; by adopting the multiple sets of discrete flexible supporting frames for supporting the rotating shaft in a matching way, the flexible supporting frames automatically follow the rotating shaft, the rotating shaft is allowed to be bent within a certain range, and the fixed supporting for a nonlinear rotating shaft can be achieved.