This creation belongs to massager technical field,A kind of helmet size adjustment structure is provided,If between the procapsid and Hou shell of the helmet of what head massager,Including rack gear,Lock,Button and tension spring,On the fixed what procapsid in the front end of rack gear,The Hou end of rack gear and the Hou end of tension spring connect,On the fixed what Hou shell in the front end of the tension spring,On one end engaging what rack gear of the lock,Elastic component is equipped on the inside of the other end of the lock,And the button is equipped with the button that setting is described on the outside of this end of elastic component and presses this end with what and move inward the lock with the elastic component so that one end that the lock engage with the rack gear and rack gear disengaging,This with the size adjustment structure in novel,More existing adjustment structure,Lock is detached from rack gear by the elastic reaction of elastic component,Structure is simple,Reliably,Components used are few,And more convenient operation.本創作屬於按摩器技術領域，提供一種頭盔大小調節結構，設於頭部按摩器的頭盔的前殼體與後殼體之間，包括齒條、鎖扣、按鈕及拉簧，齒條的前端固定於前殼體上，齒條的後端與拉簧的後端連接，該拉簧的前端固定於該後殼體上，該鎖扣的一端卡合於該齒條上，該鎖扣的另一端內側設有彈性件，且該按鈕設有彈性件的此端外側設置所述的按鈕用於按壓此端並使該鎖扣隨該彈性件向內移動以使該鎖扣與該齒條卡合的一端與該齒條脫離，本用新型中的大小調節結構，較現有的調節結構，通過彈性件的彈性作用使鎖扣與齒條脫離，結構簡單、可靠，所用零部件少，且操作更方便。
