Patent ID: 8979042
Filing Date: 2015-03-17
Classification: A61B,B25J,F16M,G02B,Y10S,Y10T

Abstract:
1. An automatic balancing structure of a medical balancing stand, the medical balancing stand having a first arm and a second arm, the second anti turnable about a turn shaft that is horizontally fixed relative to the first arm, a first end of the second arm supporting a load, a second end of the second arm having an adjustment unit to balance the second arm about the turn shaft, the automatic balancing structure comprising: a lever fixed through the turn shaft relative to the second arm and having a contact part at a front end thereof; a turn plate rotatably fixed to the turn shaft and having a pair of stoppers that are in contact with the contact part and hold the contact part; a clutch unit fixed relative to the first arm and engaging with a part of the turn plate to lock the turn plate; and a strain sensor arranged on the lever, detecting a strain occurring on the lever, and outputting a signal to the adjustment unit to balance the second arm about the turn shaft according to the detected strain, wherein in a normal state, the turn plate turns with the lever, in a balance adjusting state to cancel an imbalance, the clutch unit locks the turn plate and the strain sensor detects a strain occurring on the lever due to torque caused by the imbalance.