(57) The invention discloses a smoke alarm, which is in the field of machine design, and
the smoke alarm comprises a housing, a button column (8.1), a circuit board (4), a
smoke collecting box (5), a buzzer (7) and a tune trope (8); and the circuit board
(4), the smoke collecting box (5), the buzzer (7) and the tune trope (8) are arranged
inside the housing successively. The circuit board (4) is configured with a button
module. The smoke collecting box (5) is configured with a first through-hole. The
button column (8.1) is configured slidably inside the first through-hole. One end
of the button column (8.1) matches with the button module of the circuit board, and
another end of the button column (8.1) is connected with the tune trope (8). The tune
trope (8) is configured slidably inside the housing, and the sliding direction of
the tune trope (8) is the same as the sliding direction of the button column (8.1).
The smoke alarm drives one end of the button column (8.1) through the sliding of the
tune trope (8) to touch with the button module of the circuit board (4) to emit the
button signal. The technical plan of the invention is compact in structure, convenient
in use, easy to install and form.
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