The invention discloses a switch locking device for a
shutter, which comprises a
rocker arm (2) and a
ratchet-
gear wheel (3), a blocking piece (9), a lock tongue (4), a sliding slot (10), a rotary connecting bar (5), and a sash frame groove (6), wherein the
rocker arm (2) and the
ratchet-
gear wheel (3) are fixedly connected with a window shaft, the blocking piece (9) is used for blocking the
ratchet-
gear wheel (3), the lock tongue (4) is arranged at the inner side of the window frame bar, and the sliding slot (10) correspond to the lock tongue and is used for the sliding of the lock tongue, one end of the rotary connecting bar (5) is rotatably and pivotably supported at the bottom of the window frame, and the other end of the rotary connecting bar (5) is connected with the lock tongue (4), and the sash frame groove (6) is correspondingly arranged at the same side with the sliding slot (10) used for the sliding of the lock tongue of the window frame; the lock tongue ascends or descends by means of the rotation of the rotary connecting bar in the vicinity of a position which is perpendicular to the window frame, therefore, the
shutter can be opened, closed and locked at any opening status. The switch locking device can be used as a 120-degree horizontal or vertical
rotary switch for a middle shaft axis rotary
shutter. Therefore, the opening space is large, the switch locking device has excellent ventilation,
permeation, lighting performance, permeability, high sealing performance, sound insulation and anti-theft performance. Furthermore, the outer side of the window sash of the shutter is convenient to clean.