Infrared sensor with switch

An infrared sensor with a switch, comprising a Fresnel lens and a substrate, wherein the infrared sensor further comprises a key and a function switch, the function switch is fixed on the substrate and arranged in a direction close to the Fresnel lens, the key is installed on the Fresnel lens, the key is connected with the function switch, a user can press the key and control the function switch to work, and the function switch is electrically connected with the substrate and used for switching working states;

• and
• wherein a through hole is formed in a position, corresponding to the key, of the Fresnel lens, and the through hole is used for enabling the key to extend out of the outside.