Adjustable smoke alarm

The utility model relates to the field of fire fighting equipment, and discloses an adjustable smoke alarm which comprises a mounting plate and a smoke alarm body, a light source assembly is arranged on the smoke alarm body, two symmetrically-arranged connecting blocks are fixedly connected to the outer cambered surface of the smoke alarm body, and sliding grooves and limiting grooves are formed in the two sides and the outer side of the short edge of each connecting block respectively. According to the light source assembly and the adjustable smoke alarm of the novel alarm device, the extension assembly comprises a plurality of extension plates, and every two adjacent extension plates are in sliding connection, so that the light source assembly and the adjustable smoke alarm of the novel alarm device are connected in a sliding manner; the smoke alarm slides through the connecting blocks and the extension plates and is limited through the limiting blocks on the extension plates, certain limitation is carried