| 摘要 |
<p>PURPOSE:To achieve the safety of the patient on a medical treatment table, by respectively mounting a backrest par and an elbow receiving part to a sitting part in a revolvable manner and automatically stopping the revolution of both of them when the angle formed by the backrest part and the elbow receiving part becomes a predetermined one. CONSTITUTION:A revolving angle detection part 8 is provided in relation to a backrest part 3 and a revolving angle detection part 9 is provided in relation to an elbow receiving part 5. These detection parts are respectively constituted of fine adjustment variable resistors VR1, VR2 and rotary time variable resistors VRa, VRb. Reference voltages Vref1, Vref2 are applied to the variable resistors VRa, VRb through the variable resistors VR1, VR2 and the output voltages Va, Vb corresponding to the revolving angles thetaa, thetab of the backrest part 3 and the elbow receiving part 5 with respect to horizontality are obtained from the movable terminals 8a, 9a thereof. The output voltages Va, Vb are applied to an operation circuit 10 to perform a predetermined operation. When the angle formed by the backrest part 3 and the elbow receiving part 5 becomes an angle theta0, a control circuit 40 generates a revolution stop signal in response to said angle to apply the same to a backrest part driving part 41 and an elbow receiving part driving part 42 and the revolution of the backrest part 3 and the elbow receiving part 5 is stopped.</p> |
