Surface airbag inflatable shaft

The utility model discloses a surface air bag inflatable shaft which comprises a shaft body, an air inlet hole extending in the axis direction is formed in the shaft body, a groove and a concave cavity are formed in the outer wall of the shaft body, the groove extends in the axial direction of the shaft body, an air inlet channel is formed in the bottom wall of the groove, the air inlet channel is communicated with the air inlet hole, and the concave cavity is communicated with the air inlet hole. The concave cavities and the grooves are arranged in a staggered manner; the air bag is arranged in the groove, and the air bag is communicated with the air inlet channel; the key strip is arranged in the groove, the axis of the shaft body serves as the opposite inner side, and the key strip is located on the outer side of the air bag; the rolling body is rotatably arranged in the concave cavity, and the outer wall of the rolling body protrudes out of the outer wall of the shaft body. According to the surface air ba