Window breaking device

The utility model discloses a window breaking device. The window breaking device comprises a box body fixedly arranged on car window glass, an impact component for exerting impact force on the car window glass and a driving device which is arranged in the box body and exerts driving force on the impact component. According to the novel window breaking device, the whole window breaking process is achieved totally relying on a mechanical component, and therefore the whole window breaking operation is more safe and reliable. The stress of the car window glass is more concentrated due to the impact window breaking mode, the glass is prone to breaking, and window breaking can be more efficiently achieved. In addition, other auxiliary tools are not needed, and the window breaking process can be more conveniently completed in time, and personal safety of passengers can be ensured more fully.