Patent ID: 8087099

Claim:
A method of adjusting a size of a helmet comprising a cap-like outer shell, a cap-like impact-on-the-head absorbing liner disposed inside said cap-like outer shell and attached to said cap-like outer shell, and a cap-like head backing cover disposed inside said cap-like impact-on-the-head absorbing liner and attached to said cap-like impact-on-the-head absorbing liner, the cap-like head backing cover comprising a plurality of types of cover components, each cover component respectively comprising a cover main body portion and connecting means, the method of adjusting the size comprising: forming the plurality of types of cover components respectively, each comprising the cover main body portion and connecting means, wherein the connecting means is capable of connecting the cover main body portion of one of the cover components to the cover main body portion of another at least one of the cover components, connecting and combining the plurality of types of cover main body portions to and with each other by the connecting means, to obtain the cap-like head backing cover which comprises the plurality of types of cover components, disconnecting and separating the cover main body portions, connected to each other by the connecting means, from each other, to separate the cap-like head backing cover into the plurality of types of cover components that are independent of each other, preparing at least one type of another cover component having at least different thickness for at least one type of cover component among the plurality of types of cover components, and exchanging at least one type of cover component among the plurality of types of cover components for another cover component, so that a head accommodating space of the helmet has a different size at least at one portion.