Plate for use as child security device in e.g. window frame in school, has handle with square-shaped bar having groove for inserting handle into sleeve through passage of four cornered shaft

摘要

The plate (2) has a four cornered shaft (3) with a handle (8), and a sleeve (10) firmly integrated at the shaft, where the sleeve has a mechanism such as pushbutton with hooks (4). A metallic bar (6) connects the mechanism with the sleeve, and the handle has a square-shaped bar with a groove for inserting the handle into the sleeve through a passage of the shaft. A spring (7) is arranged below the pushbutton at the shaft.