Safety protection device for elevator car roof maintenance

The utility model discloses a safety protection device for elevator car roof maintenance, which comprises photoelectric sensors, a control circuit and an alarm, the photoelectric sensors are arranged in the rear side, the left side and the right side of a car roof guardrail, each photoelectric sensor comprises an emitter and a receiver, the emitter is arranged on one side of the corresponding guardrail, and the receiver is arranged on the other side of the corresponding guardrail. The receiver is mounted on the other side of the corresponding guardrail relative to the transmitter; the control circuit comprises a power supply and a relay, the power supply is connected with a photoelectric sensor in series, the relay is connected with the photoelectric sensor in series, and the alarm is connected with the power supply in series through a normally-closed contact of the relay. By means of the safety protection device for elevator car roof maintenance, when it is detected that the body of a maintainer stretches ou