Primary light distribution structure of directional light source

A primary light distribution structure of a directional light source, comprising:

• a lamp cup, the lamp cup being provided with a lamp cap at an end;
• a heat conducting plate, disposed inside the lamp cup and located at a middle portion of the lamp cup, the periphery of the heat conducting plate being in interference fit with and connection with the lamp cup;
• a power source, disposed inside the lamp cup and located between the lamp cup and the heat conducting plate, the power source being connected to the lamp cap;
• a light source plate, fixed to the heat conducting plate by means of a plurality of screws, the power source being electrically connected to the light source plate;
• and
• a lens structure, covering on the light source plate;
• the lens structure comprises:
• a small lens facing the light source plate, comprising:
• a lens board taking the form of a circular plate, and a plurality of lens units connected to the lens board, each of the plurality of lens units having a circular table shape and having a convex arc surface;
• and
• a planar lens, covering on the small lens, a periphery of the planar lens being fixedly connected to the other end of the lamp cup;
• the middle portion of the lamp cup extends inwardly to form a fixing plate, a periphery of the heat conducting plate being fixedly connected to the fixing plate.