An engineering protective mask which is connectable with an air supply device and comprises a hat and a mask. The hat has a front rim, a rear rim and a top area. The mask is connected to the front rim. A lens module is mounted on a window area of the mask. The air supply device connects with the top area of the hat through a tube, so as to pump air into the inner compartment of the hat. The lens module comprises a frame, a lens and an actuating module. The actuating module is operated by means of a switch in order to control the air pumped by the air supply device, such that the actuating module can drive the lens to perform opening and closing movements.本發明一種工程防護面罩,可連接於一氣體供應端;該工程防護面罩包括有:一帽體、以及一面罩。該帽體係包括一前緣、一後緣、以及一頂部。該面罩係設置於該帽體之前緣,並於該面罩上預設之一視窗位置更結合有一鏡片模組。該氣體供應端係透過一管體連接於該帽體之該頂部上,進而將一氣體灌注於該帽體之內。該鏡片模組更包括:一鏡框、一鏡片、以及一致動元件;其中,該致動元件可透過開關控制該氣體供應端所輸出之氣體,進而使該致動元件帶動該鏡片進行開啟或閉合之動作。1...工程防護面罩11...帽體111...前緣112...後緣113...頂部12...面罩121...上緣122...視窗位置123...鏡片模組1231...鏡框12311...側邊1232...鏡片1233...致動元件12331...傳動端13...氣體供應端131...管體14...防護罩141...上緣2...微調開關3...樞軸41...第一管線411...第一開關42...第二管線421...第二開關5...連動元件51...貫孔52...被動端53...主動端6...分接器81...母接頭82...公接頭
