Dental unit spittoon automatic avoiding device

The utility model relates to a dental unit spittoon automatic avoiding device, which belongs to the technical field of electronic product manufacture. The device is mainly and technically characterized in that the device comprises a chair position sensing switch, a spittoon avoiding sensing switch, a spittoon position sensing switch, a connecting circuit, a power circuit, a control circuit power supply, a MCU (Microprogrammed Control Unit) control circuit, a motor control circuit and a spittoon motor which are electrically connected with one another through lines and can detect the position of a dental chair and control the spittoon automatic avoiding. The device has a simple circuit structure, is low in manufacture cost and high in degree of automation, and can provide a safe, reliable and practical avoiding device for a dental unit spittoon and the dental chair when the dental unit spittoon and the dental chair are raised and interfere with each other.