A refill head for an oral care implement, such as a toothbrush, wherein the refill head utilizes a specially designed structure for coupling the refill head to an oral care implement handle that ensures proper alignment and simplifies the loading and unloading of the refill head to the oral care implement handle. In one embodiment, the refill head comprises a tubular sleeve forming a cavity and first and second upper cam surfaces that form shoulders within the cavity. The first and second upper cam surfaces are separated by first and second axial slots of different configurations that prevent loading of the refill head onto the oral care implement handle in an improper rotational orientation through interaction with first and second bosses on the oral care implement handle.一種口腔保健器具的再充填頭部,該口腔保健器具係例如一牙刷,其中再充填頭部利用一特別設計的結構,用於耦合再充填頭部至一口腔保健器具握把,該握把確保適當的對齊和簡化再充填頭部裝置於口腔保健器具組裝和從其卸下。在一實施例中,再充填頭部包含一形成腔室的管狀套管以及於腔室內形成肩的第一和第二上凸輪表面。第一和第二上凸輪表面被不同配置的第一和第二軸向卡槽分開,第一和第二卡槽藉由與口腔保健器具握把上的第一和第二凸輪轂的相互作用防止再充填頭部於不適當的轉動方向裝上口腔保健器具握把。1000‧‧‧電動牙刷/口腔保健器具100‧‧‧再充填頭部110‧‧‧刷頭部120‧‧‧管狀套管121‧‧‧近位端122‧‧‧遠位端123‧‧‧開口128‧‧‧第二肩/第二環形肩129‧‧‧端壁150‧‧‧凸輪軸環153‧‧‧互鎖舌片154‧‧‧環形外壁155‧‧‧第一內階157‧‧‧第一上凸輪表面159‧‧‧第一凹處161‧‧‧第一斜面部162‧‧‧第一止動部181‧‧‧內表面182‧‧‧內腔室200‧‧‧握把210‧‧‧握持部220‧‧‧桿部221‧‧‧驅動輪222‧‧‧偏心輪223‧‧‧遠端部224‧‧‧環形軸承225‧‧‧內部腔室229‧‧‧第一凸輪轂230‧‧‧第二凸輪轂
