Angle-adjustable aroma-diffusing night lamp system

An angle-adjustable aroma-diffusing night lamp system, comprising an electrical plug unit for connection to an electrical outlet for power input, a lamp socket unit for holding a lamp bulb and transferring electric current from the electrical plug unit to the lamp bulb for causing the lamp bulb to emit light, and a collar coupled to one end of said electrical plug unit and affixed to said lamp socket unit to secure said lamp socket unit to said electrical plug unit, wherein

• said electrical plug unit comprises an electrically insulative plug housing, said electrically insulative plug housing comprising a front coupling neck coupled to said collar and an electrically insulative cover plate affixed to a bottom side of said electrically insulative plug housing, and a positive contact blade and a negative contact blade mounted in said electrically insulative plug housing and inserted through said electrically insulative cover plate for connection to a city power supply outlet;
• said lamp socket unit comprises an electrically insulative socket housing, a positive copper strip and a negative copper strip mounted in said electrically insulative socket housing, a coupling socket rotatably coupled to one end of said electrically insulative socket housing, a first spring member mounted in said electrically insulative socket housing at the center and at one side relative to said positive copper strip and said negative copper strip, a center contact mounted in said electrically insulative socket housing and supported on said first spring member for contacting said positive copper strip and forced by said first spring member into positive contact with said negative contact blade, a plurality of second spring members mounted in said electrically insulative socket housing and equiangularly spaced around said first spring member, a ring contact supported on said second spring members and spaced around said center contact and electrically connected to said negative copper strip and forced by said second spring members into positive contact with said negative contact blade, a third spring member mounted in said electrically insulative socket housing at one opposite side relative to said positive copper strip and negative copper strip and a push button supported on said third spring member and operable to control contact between said enter contact and said positive copper strip;
• said collar is rotatably coupled to the front coupling neck of said electrically insulative housing, whereby to be rotated through an angle, between said electrical plug unit and said lamp socket unit.