Swing arm type human body infrared sensing switch

The invention discloses a swing arm type human body infrared sensing switch. The swing arm type human body infrared sensing switch comprises a relay connected with a power utilization terminal, and is characterized by further comprising a swing arm and a driving mechanism for driving the swing to perform pendulum motion, wherein the free end of the swing arm is provided with an infrared detector; a control device is connected with the infrared detector, is used for receiving signals input by the infrared detector, and comprises a single-chip microcomputer for detecting the variation of signals input by the infrared detector; the single-chip microcomputer is connected with the relay. The working principle of the swing arm type human body infrared sensing switch is that human body motion is replaced by sensor motion, thereby solving the problem of invariableness of signals detected by the sensor when a human body is static, and effectively avoiding the misconception of the 'nonexistence' of the human body by the infrared sensing switch. By adopting the swing arm type human body infrared sensing switch, the aim of 'turning on in the presence of people and turning off in the absence of people' is fulfilled easily and efficiently.