An instrument, article and method are provided for minimizing pain during administration by injection of a liquid, such as, an anesthetic. The instrument has a forward end. A rod or lightpipe mounted freely for vibration projects out of the forward end. The article, a single use tip, is composed of a tip sleeve removably mounted on the forward end of the instrument and a tip member removably mounted on the projecting rod or lightpipe to vibrate a preselected injection site on a human or animal. The tip sleeve and tip member are covered by an elastic overmold that enables the tip member to vibrate freely with respect to the tip sleeve and light from the lightpipe to illuminate the injection site. The overmold of the single use tip is torn during removal of the single use tip from the instrument.一種在注射如麻醉劑的液體時,用於將疼痛降到最低的儀器、物件和方法。此儀器設計有前端,有光傳輸桿或導光管安裝外凸於前端處,可自由活動。此物件為一次使用性的可拋棄式注射針,含一個針套藉由可拆卸式的方法安裝於儀器前端,而注射針元件藉由可拆卸式的方法安裝於突出桿或導光管上,可在人體或動物體的預設注射部位上振動。此針套和注射針元件覆蓋有彈性包覆套,可讓注射針元件於針套上自由活動,讓導光管的光線照明於注射部位上。自本儀器移除一次使用性的可拋棄式注射針時,即可讓注射針的包覆套潰裂。34‧‧‧手把套50‧‧‧注射針51‧‧‧塑膠杯53‧‧‧鏡片55‧‧‧突出腳59‧‧‧切口61‧‧‧肋板62‧‧‧針套101‧‧‧凸緣103‧‧‧牙部150‧‧‧突出部152‧‧‧肩部154‧‧‧後縮部
