Helmet with inwards flipping type goggle

A helmet with an inwards flipping type goggle, comprising a helmet body, a google, a front protection lens and a link mechanism;

• the front protection lens is fixed to the front side of the helmet body, the goggle is fixed to the link mechanism, the link mechanism is capable of adjusting the goggle to move up and down and to be rotatably connected to the two sides of the helmet body, and the goggle is located in the helmet body;
• the link mechanism comprises a link rack and a rocker arm link, wherein one end of the rocker arm link is rotatably connected to the side surface of the helmet body through a first connecting shaft, the other end of the rocker arm link is fixedly connected to the middle portion of the link rack through a second connecting shaft, the link rack is placed in the helmet body, one end of the link rack is fixedly connected to the goggle, the other end is slidably connected to the helmet body through a third connecting shaft, and the first connecting shaft, the second connecting shaft and the third connecting shaft are sequentially far away from the front side of the helmet body;
• the helmet further comprising a sector-shaped limiting plate, the limiting plate is fixed to the helmet body and covers the external portion of the rocker arm link, and one end, far from the first connecting shaft, of the limiting plate is provided with a sector-shaped groove;
• one side, facing to the internal portion of the helmet body, of the limiting plate is provided with a first hollow cylinder, the first cylinder is provided at the small end of the limiting plate, one end of the rocker arm link is provided with a sleeve, the sleeve rotatably sleeves the first hollow cylinder, and the first connecting shaft is in fit connection with the first hollow cylinder.