Yi Seed Kou Qiang Expansion Zhang devices include this Body of mono-, bis- this Body, Tooth Wheels Mo Group, Xuan Turn parts, locating part. First Body includes Shell Body and the first Duck mouth Brace pieces. 2nd Body packet conjunction containing Knot portion and the 2nd Duck mouth Brace pieces. Tooth Wheels Mo Group Bao Han Tooth Wheels circles, Zhong Xin Tooth Wheels and Hang Xing Tooth Wheels Tooth Wheels Quan Let set the surface of Yu Top Cover, and position what The Top Cover week Edge, the Wheels centers Yu Top Cover Zhong Xin Tooth, Hang Xing Tooth Wheels Deng Jiao Let set all Edge of what Zhong Xin Tooth Wheels, and Hang Xing Tooth Wheels Fen Do With Tooth Wheels circles and Zhong Xin Tooth Wheels Nie are closed. Xuan Turn parts include Zhong Xin Shaft Ji Tooth Wheels pieces, Zhong Xin Shaft Consistent Chuan Let what this Body of mono- and bis- this Body , Qie Even Jie Tooth Wheels pieces. Xuan Turn part Tapes Move bis- this Body Turn Move. Limit Jian Let set what this Body of mono-, and When limits Jian With Tooth Wheels Pian Jie Touch Time, Xian Tooth Wheels Pian Turn Move.一種口腔擴張器包含第一本體、第二本體、齒輪模組、旋轉件、限位件。第一本體包含殼體及第一鴨嘴撐片。第二本體包含結合部及第二鴨嘴撐片。齒輪模組包含齒輪圈、中心齒輪、及行星齒輪,齒輪圈設置於頂蓋的表面,且位於該頂蓋周緣、中心齒輪位於頂蓋中心,行星齒輪等角設置於中心齒輪的周緣,且行星齒輪分別與齒輪圈及中心齒輪齧合。旋轉件包含中心軸及齒輪片,中心軸貫穿設於第一本體及第二本體,且連接齒輪片。旋轉件帶動第二本體轉動。限位件設置於第一本體,當限位件與齒輪片接觸時,限制齒輪片轉動。1‧‧‧口腔擴張器10‧‧‧第一本體11‧‧‧殼體111‧‧‧周緣壁1117‧‧‧刻度113‧‧‧頂蓋1133‧‧‧固定件117‧‧‧插接槽13‧‧‧第一鴨嘴撐片131‧‧‧第一接觸面15‧‧‧後蓋151‧‧‧滑槽20‧‧‧第二本體21‧‧‧結合部211‧‧‧第二開孔23‧‧‧第二鴨嘴撐片231‧‧‧第二接觸面30‧‧‧旋轉件31‧‧‧中心軸311‧‧‧第一端313‧‧‧第二端315‧‧‧限位面33‧‧‧旋轉鈕35‧‧‧齒輪片351‧‧‧第四開孔3511‧‧‧第四限位側353‧‧‧單向齒排37‧‧‧扣環40‧‧‧限位件41‧‧‧撥動樞紐411‧‧‧固定孔43‧‧‧棘動齒排431‧‧‧第二穿孔45‧‧‧插銷47‧‧‧彈簧50‧‧‧齒輪模組51‧‧‧齒輪圈511‧‧‧第一齒塊53‧‧‧中心齒輪531‧‧‧第二齒塊533‧‧‧第三開孔5331‧‧‧第三限位側55‧‧‧行星齒輪551‧‧‧第三齒塊553‧‧‧固鎖件
