Patent RU-2627614-C2 (RU)
Inventor: GUO YIJUN
IPC: A61B17/14
Filed: 2013-04-16
Granted: 2017-08-09
Abstract: FIELD: medicine. 
     SUBSTANCE: group of inventions refers to medical equipment, in particular to a manual pistol unit for drilling and sawing in orthopedics, as well as to a power system providing drilling and sawing in orthopedics using a pistol unit, applied in surgical operations. The manual pistol unit with a power drive for drilling and sawing in orthopedics contains at least a handle body, a clamping device for cutting tool gripping, a driving motor for power generation and cutting tool driving to perform drilling and sawing operations, and a switch assembly to control the drive motor output power. The drive motor is connected to an external power source. The drive motor is connected to an external control system configured to control the drive motor operating mode using the switch assembly, and the control system is configured to actuate the drive motor for its rotation in the positive direction, reverse direction, and also rotation forward and backward, using the switch assembly. The switch assembly includes at least a guide rod, a guide rod control mechanism and a guide rod sensor element. At that, two guide rods are provided, which are located in the corresponding slots for guide rods. Two guide rods perform sliding reciprocating movements in the axial direction along the corresponding guide rods slots. A through radial opening is provided on the side wall of the guide channel of each rod guide slot, and the guide channel of the guide rod slot is adapted to pass through the corresponding guide rod. A roller is slidably mounted in the through radial opening, the length of the through radial opening is smaller than the roller diameter, and the guide rod is axially lockable by slipping the roller inwardly. At that, the guide rod control mechanism comprises a movable unit capable of rotating about an axis parallel to the guide rods. The rollers of the two guide rods are positioned so that they are facing directly towards the movable unit. The movable unit is characterized by two annular wave-like areas for rollers. The annular wave-like areas are configured to actuate by rotating the movable unit to communicate motion to the rollers that begin to move along the respective through radial openings. At that, the design of the two annular wave-like areas is arranged to actuate the rollers on both sides of these areas to simultaneously lock the respective guide rods, simultaneously releasing the corresponding guide rods or locking one of the guide rods and releasing the other guide rod at the same time. And the guide rod sensor element is adapted to receive signals about movement of the two guide rods and transmit the received signals about movement to the external control system. The power system provides drilling and sawing in orthopedics, contains the main device, a foot controller connected to the main device, and the above manual pistol unit with a power drive for drilling and sawing in orthopedics connected to the main device. 
     EFFECT: inventions allow to ensure uninterrupted operation of the device, reduction of the device total weight, simplification of control and increase of operational efficiency. 
     9 cl, 5 dwg