The invention discloses an external fixing type which can be adjusted automatically<br>The bone extender comprises two fixing rings, one of which is far away from the bone<br>The side surface away from the other fixing ring is fixedly provided with four electric rings<br>The output shaft of each motor is fixed with motor wire<br>The two fixing rings are connected with four evenly distributed extension rods<br>A screw rod is arranged between the motor screw rod and the extension screw rod<br>The two ends of the rod connecting piece are respectively fixed<br>There is a nut, and the nut at one end of the rod connecting piece is connected with the motor wire<br>The screw thread of the rod is connected, and the nut at the other end is fixed with the extension screw rod<br>connect. The invention can automatically adjust the external fixation bone extension<br>The device can realize automatic adjustment and improve the comfort of patients.<br>
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