Light emitting device

A light emitting assembly comprising:

• a heat sink including a base wall and two opposite retaining walls extending upright from said base wall and defining respectively two retaining grooves, each of said retaining walls having a top wall portion confining a top side of a respective one of said retaining grooves;
• a mounting seat having two opposite wings extending oppositely and respectively into said retaining grooves;
• a light emitting device mounted on said mounting seat between said wings and having a bottom wall extending through said mounting seat to abut against said base wall of said heat sink;
• and
• a casing having first and second casing halves;
• wherein each of said wings of said mounting seat is formed with an elastic protrusion that abuts resiliently against said top wall portion of a respective one of said retaining walls, thereby resulting in a pushing force acting on said mounting seat to press said bottom wall of said light emitting device against said base wall of said heat sink;
• wherein said mounting seat further has a cylindrical reflector housing having upper and lower ends, and a frusto-conical reflecting wall extending inwardly and downwardly from said upper end of said reflector housing, said frusto-conical reflecting wall having a bottom wall portion and defining an accommodating space therein, said wings extending radially and oppositely from said lower end of said reflector housing, said bottom wall portion of said frusto-conical relecting wall being formed with a hole, said light emitting device extending fittingly through said hole in said bottom wall portion of said frusto-conical reflecting wall, and further having a transparent encapsulant that is disposed in said accommodating space for passage of emitted light therethrough;
• and
• wherein said first casing half cooperates with said second casing half to define an inner space therein, said first casing half being formed with a light-through opening and a tubular confining wall extending inwardly from a periphery of said light-through opening into said inner space, said reflector housing extending fittingly into said confining wall of said first casing half, said second casing being formed with a retaining hole, said base wall being further formed with a fin-surrounding wall that surrounds said first fins of said base wall of said heat sink and that is fitted into said retaining hole in said second casing half, said retaining walls of said heat sink being disposed in said inner space in said casing.