Safety helmet with bellows cushioning device

A safety helmet comprising:

• an outer shell;
• an inner shell juxtapositionally secured to the outer shell confining an air chamber spaced between the outer shell and the inner shell;
• a plurality of cushioning bellows each said bellows retained between the outer shell and the inner shell;
• an air-penetrable layer adhered on an inside surface of the inner shell;
• and
• a cap frame sealably combining the outer shell, the inner shell and the air-penetrable layer for forming a complete helmet to be worn by a wearer, whereby upon an acting of an external impact force upon the outer shell, the cushioning bellows will dampen the external impact force to prevent a great shock caused by the external force to the wearer's head;
• said inner shell formed with a plurality of venting holes in the inner shell for fluidically communicating the air chamber defined between the two shells and the air-penetrable layer adjacent to a wearer's head;
• and
• each said cushioning bellows made of resilient elastomers including:
• a plurality of flexible corrugated flanges circumferentially gradationally formed on an outer cylindrical wall of the bellows, a central socket formed in a central portion of the bellows and downwardly recessed from an upper portion of the bellows having an uppermost flange of the corrugated flanges normally contacting an inside surface of the outer shell forming an air sac in the central socket between the bellows and the outer shells, and a retaining base portion formed on a bottom portion of the bellows engageably fixed in each bellows hole formed in the inner shell.