| 摘要 |
An LED bulb includes a lower cover having ventilation holes formed at outer periphery thereof, and a first coupling opening formed at top side thereof; a separating unit provided within the lower cover at a position between lower edges of the ventilation holes and bottom side of the lower cover, and having a convection pathway formed at top side thereof; a heat sink having bottom end positioned on top side of the separating unit; and an upper cover having top side formed with convection hole corresponding to top end of the heat sink, and a second coupling opening formed at bottom side thereof. When the second and first coupling openings are coupled with each other, the upper and lower covers are assembled together to form a central axis bidirectional convection heat dissipation pathway sequentially through the ventilation hole, the convection pathway, the heat sink and the ventilation hole accordingly. |
