Knee guard device, a seat and a vehicle

The invention provides a knee guard device, a seat and a vehicle, which relate to the technical field of vehicle engineering. The knee guard device provided by the invention comprises an air bag and an air generator, wherein the air generator is in fluid communication with the air bag, and the air bag is arranged in a vulnerable shell or a seat in a contracted state; as that airbag is deployed, the airbag includes an extension and a shield, and the gas generator, the extension and the shield are in fluid communication in turn, the guard is located at the outlet end of the extension, the knee guard device provided by the invention solves the technical problem that the airbag arrangement used for knee protection in the prior art occupies the dashboard space, is not conducive to the arrangement of vehicle components, is conducive to saving the dashboard space, is convenient for the arrangement of vehicle components, can better protect the personnel on the seat, and improves the safety ofthe vehicle. 本发明提供了种膝盖防护装