FIELD: fire alarm system.
SUBSTANCE: fire alarm includes dismountable body with window on top and circuit board with optical indicators, switch and clamping on bottom. Light guide with internal scatterers is located around window in respective hollow. Window is provided with holes for optical indicators. Pusher ensuring reciprocal motion is installed onto holders on window edges. Pusher is connected to internal mounting hollow. Pusher is provided with bushing which is rigidly fastened to elastic plate of clamping element. Plate with slots is located between minimum bending moment areas of vertical effort applied to elastic plate. In addition, clamping element is fastened to body bottom with screws passing through circuit board. Pusher may be with beads separated by guiding grooves for holders. Mounting hollow of pusher is provided with openings for return element. Opening dimensions fit bushing opening sizes.
EFFECT: improvement of operation reliability; decrease of labour-output ratio; simplification of assembling.
5 cl, 3 dwg
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