| 摘要 |
PURPOSE: To prevent efficiency of therapeutic work of a dentist or an assistant from decreasing by rotating a dental light in an direction in proportion to the height of a chair for therapy and the angle o inclination of a back plate and illuminating the mouth of a patient on the chair for therapy. CONSTITUTION: A height sensor 11b transmitting an output accordance with the amt. of elevating of a seat part, an angle sensor 12b transmitting an output in accordance with the angle of inclination of a back plate and a traverse-angle sensor 11d transmitting an output in accordance with the angle of traverse of the seat part are fixed on a chair for therapy. A fixed article is arranged near the chair and a control circuit 4 and a signal transmitting machine 5 are built therein. A dental light is fixed on the ceiling and a driving source 63 consisting of a reduction gear 63a and a motor 63b is fixed in a case. Then, signals transmitted from sensors 11b, 12b and 11d are received by means of a receiver 7 fixed on a case 62 and the dental light is rotated by the driving source 63 to illuminate the mouth of the patient. |
