Reuse on the hypodermic injection units such as a kind of injection aid, the disposable conventional syringe of dismounting what or pen-type injector (hereinafter referred to as " syringe "), help user more can conveniently, safety is subcutaneously injected. The injection aid includes: a pedestal,Have it is opposite proximally and distally,System to accommodate all parts,And inner space is provided to fixed syringe； One clamping device,The distal end of position what pedestal,To on unarmed fast assembling-disassembling auxiliary device what syringe,Auxiliary device is set to reuse； One injection guide sleeve,Position what pedestal proximal end and coaxially include syringe what in,Large contact area is provided with stable injectable,And there is perspectivity and enlarging function,It can be seen clearly that injection areas,It avoids pricking blood vessel and causes bleeding,Separately there is conducting space guidance needle of infusion set to use with dismounting and finish syringe needle,It avoids stabbing finger； One light source module group,The surrounding of guide sleeve is injected on the what pedestal of position and around what,By above injection direction,Illumination is provided with the injection of sharp night； One electric power supply unit,What pedestal side is disposed,Supply electrical power to light source module group； One depth adjustment part,To set injection depth,User carries out the syringe needle for not needing to change different length when different parts injection.一種注射輔助裝置，拆裝於一次性傳統注射器或筆型注射器(以下簡稱為”注射器”)等皮下注射裝置上重複使用，幫助使用者更能方便、安全的進行皮下注射。該注射輔助裝置包括：一基座，有相對的近端和遠端，係用以容置所有零件，並提供內部空間用以固定注射器；一夾持機構，位於基座的遠端，用以徒手快速拆裝輔助裝置於注射器上，使輔助裝置能重複使用；一注射導套，位於基座的近端並同軸包含注射器於內，提供較大接觸面積以穩定注射，並具有透視性及放大功能，可以清楚看見注射區域，避免扎到血管造成出血，另有一導引空間引導針頭套回套以安全拆卸用畢針頭，避免扎傷手指；一光源模組，位於基座上且環繞於注射導套的四周，由注射方向上方，提供照明以利夜間注射；一電力供應單元，安置於基座側邊，提供電力給光源模組；一深度調整件，用以設定注射深度，使用者進行不同部位注射時不需更換不同長度的針頭。
