Endoscope capsule controller and reduction gear pull back device thereof

The utility model discloses a reduction gear pull back device, including the cover establish reduction gear transmission shaft peripheral part, with reduction gear stiff end fixed connection's hollow rotating shaft, the cover is established the bearing frame of hollow rotating shaft peripheral part, be located the hollow rotating shaft with between the bearing frame, be used for supplying the bearing frame is followed hollow rotating shaft pivoted bearing. The utility model provides a reduction gear pull back device is through setting up the bending resistance square structure that comprises bearing, bearing frame and hollow rotating shaft for big moment of flexure is no longer accepted to the reduction gear, mainly transmit the moment of torsion can, make the reduction gear only need according to the moment of torsion, the model selecting to be fit for can, the volume of reduction gear is effectively reduced, saves space reduce cost. The utility model also discloses an endoscope capsule controller of includi