Ultraviolet germicidal lamp lamp cap and power supply the engagement seat that this creation system matches and can be connected to each other,Column is worn by making lamp cap protrude two,Engagement seat is recessed with two and is arranged slot,And the second pin of lamp cap worn on column is identical as the engagement polarity of electrode of the second jack of seat being arranged in slot,And shape,Position is corresponding,Therefore the second pin, which can cooperate, wears the second jack of what； And worn on column by the second pin of what position what is outstanding,And second jack position what section it is big compared with the first jack be arranged in slot,Therefore user is evident that the position of the second pin and the second jack,And then allow user can easily it is primary just correctly engagement lamp cap with engage seat.本創作係相配合且可相對接的紫外線殺菌燈燈頭及電源接合座，藉由使燈頭突出有兩穿設柱，接合座凹設有兩套設槽，並且燈頭的穿設柱上的第二接腳與接合座的套設槽內的第二插孔的電極極性相同，且形狀、位置相對應，因此第二接腳可配合穿設於第二插孔；而由於第二接腳位於突出的穿設柱上，且第二插孔位於截面較第一插孔大的套設槽內，因此使用者可明顯看出第二接腳及第二插孔的位置，進而讓使用者可輕易地一次便正確地接合燈頭與接合座。
