Electromagnetic suction cup for fire door, has concentrating unit including lens conceived to concentrate light rays emitted by LED through opening, and to diffuse concentrated light rays outside housing

摘要

The suction cup (1) has a housing (2) with walls (3, 3', 3'') and an opening, where an electromagnet (7) is provided in the housing. A light source i.e. LED emits light rays to visualize the operating condition of the suction cup. An operation management unit includes an electronic board, where the LED is located inside the housing on the electronic board. A concentrating unit (12) includes a lens (120) conceived to concentrate the light rays emitted by the LED through the opening, and to diffuse the concentrated light rays outside the housing.