Protection circuit for SCM control circuit

The utility model provides a guard circuit used in single-chip control circuit, including a single-chip, detector switches, a detection signal input circuit, a single chip output circuit and an executive circuit. The single-chip is the core control component of circuit and is used to realize logical control of circuit; the detector switch is used to detect the location information of the mechanical devices of electronics, or other information; the detection signal input circuit is used to receive on-off state of the detector switch and input the state to the input end of the single-chip; the single-chip output circuit is used to transform the output of the single-chip output end into switching signal, and control the execution of the executive component through such switching signal; the executive circuit is used to execute electrical actions; the detector switch and the executive circuit connected in series, and when the detector switch turns off, the executive circuit will lose electricity. The guard circuit can continue to take protective effect when the single-chip makes misjudgment or when the output circuit of the single-chip incurs abnormal operation, so as to avoid physical injury to personnel.